研究者業績
基本情報
- 所属
- 千葉大学 医学部附属病院循環器内科 助教 (診療講師)
- 学位
- 医学博士(2017年3月 千葉大学)
- 研究者番号
- 50861134
- ORCID ID
https://orcid.org/0000-0001-6993-5152- J-GLOBAL ID
- 202101011952297584
- researchmap会員ID
- R000023470
学歴
2-
2013年4月 - 2017年3月
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2003年4月 - 2009年3月
論文
49-
Journal of clinical medicine 13(11) 2024年5月30日Background: Although takotsubo syndrome (TTS) is characterized by transient systolic dysfunction of the left ventricle (LV), the time course and mechanism of LV function recovery remain elusive. The aim of this study is to evaluate cardiac functional recovery in TTS via serial cardiac magnetic resonance feature tracking (CMR-FT). Methods: In this Japanese multicenter registry, patients with newly diagnosed TTS were prospectively enrolled. In patients who underwent serial cardiovascular magnetic resonance (CMR) imaging at 1 month and 1 year after the onset, CMR-FT was performed to determine the global circumferential strain (GCS), global radial strain (GRS) and global longitudinal strain (GLS). We compared LV ejection fraction, GCS, GRS and GLS at 1 month and 1 year after the onset of TTS. Results: Eighteen patients underwent CMR imaging in one month and one year after the onset in the present study. LV ejection fraction had already normalized at 1 month after the onset, with no significant difference between 1 month and 1 year (55.8 ± 9.2% vs. 58.9 ± 7.3%, p = 0.09). CMR-FT demonstrated significant improvement in GCS from 1 month to 1 year (-16.7 ± 3.4% vs. -18.5 ± 3.2%, p < 0.01), while there was no significant difference in GRS and GLS between 1 month and year (GRS: 59.6 ± 24.2% vs. 59.4 ± 17.3%, p = 0.95, GLS: -12.8 ± 5.9% vs. -13.8 ± 4.9%, p = 0.42). Conclusions: Serial CMR-FT analysis revealed delayed improvement of GCS compared to GRS and GLS despite of rapid recovery of LV ejection fraction. CMR-FT can detect subtle impairment of LV systolic function during the recovery process in patients with TTS.
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Circulation journal : official journal of the Japanese Circulation Society 2024年4月27日
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Circulation reports 6(4) 149-150 2024年4月10日
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JACC: Case Reports 21 101976-101976 2023年9月
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Cardiovascular Intervention and Therapeutics 38(4) 381-387 2023年5月19日
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Circulation journal : official journal of the Japanese Circulation Society 86回 JO11-9 2022年8月27日 査読有りBACKGROUND: Dialysis patients have strong intracoronary calcification, accelerated by secondary hyperparathyroidism as well as atherosclerosis. We evaluated the association of intact parathyroid hormone (iPTH) level with intracoronary calcification evaluated by intravascular ultrasound (IVUS), and its impact on both stent expansion after percutaneous coronary intervention (PCI) and long-term clinical outcomes, in dialysis patients with coronary artery disease (CAD).Methods and Results: A total of 116 patients on dialysis, who underwent PCI with IVUS guidance between March 2012 and December 2020, were enrolled. Patients were divided into 2 groups based on their median iPTH level. The degree of intracoronary calcification was evaluated by calcification score using grayscale IVUS in the target lesions. Preprocedural calcification scores were significantly higher in the high iPTH group compared with the low iPTH group (2.9±1.1 vs. 2.1±0.7, P<0.001). After PCI, the high iPTH group had a significantly lower stent expansion index (0.6±0.2 vs. 0.7±0.1, P<0.001) and stent symmetry index (0.5±0.1 vs. 0.7±0.1, P<0.001) compared with the low iPTH group. The incidence of major adverse cardiac or cerebrovascular events within 3 years was significantly higher in the high iPTH group (log-rank P<0.05). CONCLUSIONS: High iPTH level is likely to increase intracoronary calcification, and cause inadequate stent expansion, which may be associated with increased risk of future adverse events in dialysis patients with CAD requiring PCI.
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Heart (British Cardiac Society) 108(17) 1334-1337 2022年8月11日 査読有り
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Heart and Vessels 37(9) 1489-1495 2022年3月17日 査読有りPatients with epicardial coronary vasospastic angina (VSA) may be likely to have coronary microvascular dysfunction, although mixed results have been reported. The aim of this study was to evaluate coronary microvascular function in detail using novel invasive physiologic indices, such as resistive reserve ratio (RRR) and microvascular resistance reserve (MRR). A total of 45 patients undergoing intracoronary acetylcholine (ACh) provocation test and invasive coronary circulatory evaluation using a thermodilution method were prospectively included. VSA was diagnosed as angiographic vasospasm accompanied by chest pain and/or ischemic electrocardiographic changes by intracoronary injection of ACh. Coronary circulation was assessed with physiologic indices including fractional flow reserve, resting and hyperemic mean transit time (Tmn), coronary flow reserve (CFR), basal resistance index, index of microcirculatory resistance (IMR), RRR, and MRR. Of 45 patients, 23 (51.1%) were diagnosed as having VSA. Patients with positive ACh test had longer resting Tmn (slower coronary flow velocity), higher basal resistance index, and greater RRR and MRR than those without, while fractional flow reserve, CFR, and IMR did not differ significantly between the two groups. In conclusion, although conventional measures such as CFR and IMR failed to show significant differences, RRR and MRR, novel invasive coronary physiologic indices, provided counterintuitive insights that coronary microvascular dilation function was better preserved in patients with VSA than those without.
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Cardiovascular Intervention and Therapeutics 37(4) 699-699 2022年3月8日 査読有りThis study sought to investigate the relationship between physiological severity and plaque vulnerability of intermediate coronary artery stenoses as assessed by fractional flow reserve (FFR) and near-infrared spectroscopy-intravascular ultrasound (NIRS-IVUS). We included vessels where both FFR and NIRS-IVUS were performed. A positive FFR was defined as FFR ≤ 0.80. Lipid core burden index of the entire target vessel (TV-LCBI), maximum LCBI in 4 mm (maxLCBI4mm), and maximum plaque burden (PB) were evaluated using NIRS-IVUS. A vulnerable plaque was defined as a lipid-rich plaque (maxLCBI4mm ≥ 400) with large PB (≥ 70%). A total of 59 vessels of 45 patients were included. Median FFR value was 0.75 [interquartile 0.72, 0.82]. An FFR value of ≤ 0.80 was observed in 42 vessels (71%). TV-LCBI (correlation coefficient [CC] = - 0.331, p = 0.011), lesion length (CC = - 0.350, p = 0.007), and PB (CC = - 0.230, p = 0.080) negatively correlated with FFR value, while maxLCBI4mm did not (CC = - 0.156, p = 0.24). The prevalence of vulnerable plaques (26.2% vs. 29.4%, p > 0.99) and mean TV-LCBI, maxLCBI4mm, and PB values were not significantly different between the vessels with FFR ≤ 0.80 and those with FFR > 0.80. In multivariable logistic models, diabetes mellitus (p = 0.003) and hemoglobin A1c (p = 0.012) were associated with the presence of a vulnerable plaque. In conclusion, the results of the present study suggested that FFR may reflect total lipid burden but not necessarily plaque vulnerability. In patients with coronary artery disease and a high likelihood of rapid atherosclerosis progression, such as diabetes mellitus patients, assessing plaque vulnerability in addition to the functional severity of coronary artery lesions may help stratify better the risk of future events.
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Journal of clinical medicine 11(4) 2022年2月14日 査読有り筆頭著者責任著者BACKGROUND: The wall motion abnormalities of the left ventricle (LV) in takotsubo syndrome (TTS) are known to be transient and completely recover within a few weeks. However, there is little information about the relationship between functional recovery and tissue characteristics. The aim of this study was to investigate the recovery process of TTS using cardiovascular magnetic resonance (CMR). METHODS: Consecutive patients with TTS were prospectively enrolled. We performed serial CMR in the acute phase (<72 h after admission), the subacute phase (7-10 days after admission) and the chronic phase (3 months later). To assess the degree of myocardial edema quantitatively, we evaluated the signal intensity of myocardium on T2-weighted images and calculated the signal intensity ratio compared with the skeletal muscle. RESULTS: Fifteen patients with TTS were enrolled. CMR demonstrated reduced LV ejection fraction in the acute phase, and it recovered almost completely by the subacute phase. On the other hand, severe myocardial edema was still observed in the subacute phase, associated with increased LV mass. The highest signal intensity ratio in the subacute phase was correlated with the maximum voltage of negative T wave on electrocardiogram (r = 0.57, p = 0.03). CONCLUSIONS: In patients with TTS, myocardial edema associated with increased LV mass still remained in the subacute phase despite functional recovery of the LV. Electrocardiogram may be useful to assess the degree of myocardial edema in the subacute phase. Our study suggests that myocardial ischemia might have a central role in developing TTS.
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International Journal of Cardiology 349 7-11 2021年11月 査読有りBACKGROUND: Vasospastic angina (VSA) is reportedly associated with several clinical characteristics such as smoking and high-density lipoprotein (HDL) cholesterol, in which gender differences are present. For instance, smoking rates among men are higher than those among women, and a normal range of HDL cholesterol differs across genders. However, their impact between men and women on VSA is unclear. METHODS: A total of 797 patients (427 men and 370 women) undergoing intracoronary acetylcholine (ACh) provocation test to diagnose VSA were included. The positive ACh provocation test was defined as angiographic vasospasm accompanied by chest pain and/or ischemic electrocardiographic changes. Factors contributing to VSA across genders were evaluated by multivariable analyses. RESULTS: Of 797 patients, 414 (51.9%) had positive ACh provocation test. The incidence of positive ACh test was higher in men than in women (56.9% vs. 46.2%, p = 0.003). In the entire study population, current smoking and a lower HDL cholesterol level were determined as factors associated with VSA. In both men and women, an HDL cholesterol level was identified as a factor contributing to positive ACh test. CONCLUSIONS: Among patients suspected for VSA, men as compared with women were more likely to have positive ACh provocation test. While current smoking and an HDL cholesterol level were associated with VSA in the entire study population, a lower HDL cholesterol level was determined as the only factor contributing to positive ACh test across genders, suggesting that HDL cholesterol plays important roles in the mechanism of VSA.
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JACC. Case reports 3(9) 1211-1215 2021年8月4日 査読有りHyperperfusion injury is a rare but critical complication associated with revascularization for long-standing severe artery stenosis. Here we report a rare case of a patient with renal hyperperfusion injury after undergoing percutaneous transluminal renal angioplasty for renovascular hypertension as a sequela of neuroblastoma after radiation therapy. (Level of Difficulty: Advanced.).
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Journal of the American Heart Association 10(15) e014059 2021年8月3日 査読有りBackground Atrial fibrillation (AF) is a major risk factor for mortality. The prevalence, clinical correlates, and prognostic impact of AF in Takotsubo syndrome (TTS) have not yet been investigated in a large patient cohort. This study aimed to investigate the prevalence, clinical correlates, and prognostic impact of AF in patients with TTS. Methods and Results Patients with TTS were enrolled from the International Takotsubo Registry, which is a multinational network with 26 participating centers in Europe and the United States. Patients were dichotomized according to the presence or absence of AF at the time of admission. Of 1584 patients with TTS, 112 (7.1%) had AF. The mean age was higher (P<0.001), and there were fewer women (P=0.046) in the AF than in the non-AF group. Left ventricular ejection fraction was significantly lower (P=0.001), and cardiogenic shock was more often observed (P<0.001) in the AF group. Both in-hospital (P<0.001) and long-term mortality (P<0.001) were higher in the AF group. Multivariable Cox regression analysis revealed that AF was independently associated with higher long-term mortality (hazard ratio, 2.31; 95% CI, 1.50-3.55; P<0.001). Among patients with AF on admission, 42% had no known history of AF before the acute TTS event, and such patients had comparable in-hospital and long-term outcomes compared with those with a history of AF. Conclusions In patients presenting with TTS, AF on admission is significantly associated with increased in-hospital and long-term mortality rates. Whether antiarrhythmics and/or cardioversion are beneficial in TTS with AF should thus be tested in a future trial. Registration URL: https://www.clinicaltrials.gov; Unique identifier: NCT01947621.
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ESC heart failure 8(3) 1924-1932 2021年6月 査読有り筆頭著者AIMS: Acute pulmonary disorders are known physical triggers of takotsubo syndrome (TTS). This study aimed to investigate prevalence of acute pulmonary triggers in patients with TTS and their impact on outcomes. METHODS AND RESULTS: Patients with TTS were enrolled from the International Takotsubo Registry and screened for triggering factors and comorbidities. Patients were categorized into three groups (acute pulmonary trigger, chronic lung disease, and no lung disease) to compare clinical characteristics and outcomes. Of the 1670 included patients with TTS, 123 (7%) were identified with an acute pulmonary trigger, and 194 (12%) had a known history of chronic lung disease. The incidence of cardiogenic shock was highest in patients with an acute pulmonary trigger compared with those with chronic lung disease or without lung disease (17% vs. 10% vs. 9%, P = 0.017). In-hospital mortality was also higher in patients with an acute pulmonary trigger than in the other two groups, although not significantly (5.7% vs. 1.5% vs. 4.2%, P = 0.13). Survival analysis demonstrated that patients with an acute pulmonary trigger had the worst long-term outcome (P = 0.002). The presence of an acute pulmonary trigger was independently associated with worse long-term mortality (hazard ratio 2.12, 95% confidence interval 1.33-3.38; P = 0.002). CONCLUSIONS: The present study demonstrates that TTS is related to acute pulmonary triggers in 7% of all TTS patients, which accounts for 21% of patients with physical triggers. The presence of acute pulmonary trigger is associated with a severe in-hospital course and a worse long-term outcome.
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Clinical research in cardiology : official journal of the German Cardiac Society 111(2) 186-196 2021年5月19日 査読有り筆頭著者BACKGROUND: Ethnic disparities have been reported in cardiovascular disease. However, ethnic disparities in takotsubo syndrome (TTS) remain elusive. This study assessed differences in clinical characteristics between Japanese and European TTS patients and determined the impact of ethnicity on in-hospital outcomes. METHODS: TTS patients in Japan were enrolled from 10 hospitals and TTS patients in Europe were enrolled from 32 hospitals participating in the International Takotsubo Registry. Clinical characteristics and in-hospital outcomes were compared between Japanese and European patients. RESULTS: A total of 503 Japanese and 1670 European patients were included. Japanese patients were older (72.6 ± 11.4 years vs. 68.0 ± 12.0 years; p < 0.001) and more likely to be male (18.5 vs. 8.4%; p < 0.001) than European TTS patients. Physical triggering factors were more common (45.5 vs. 32.0%; p < 0.001), and emotional triggers less common (17.5 vs. 31.5%; p < 0.001), in Japanese patients than in European patients. Japanese patients were more likely to experience cardiogenic shock during the acute phase (15.5 vs. 9.0%; p < 0.001) and had a higher in-hospital mortality (8.2 vs. 3.2%; p < 0.001). However, ethnicity itself did not appear to have an impact on in-hospital mortality. Machine learning approach revealed that the presence of physical stressors was the most important prognostic factor in both Japanese and European TTS patients. CONCLUSION: Differences in clinical characteristics and in-hospital outcomes between Japanese and European TTS patients exist. Ethnicity does not impact the outcome in TTS patients. The worse in-hospital outcome in Japanese patients, is mainly driven by the higher prevalence of physical triggers. TRIAL REGISTRATION: URL: https://www.clinicaltrials.gov ; Unique Identifier: NCT01947621.
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Scientific reports 10(1) 20537-20537 2020年11月25日 査読有り筆頭著者Cardiac magnetic resonance (CMR) imaging has become an important technique for non-invasive diagnosis of takotsubo syndrome (TTS). The long-term prognostic value of CMR imaging in TTS has not been fully elucidated yet. This study sought to evaluate the prognostic value of texture analysis (TA) based on CMR images in patients with TTS using machine learning. In this multicenter study (InterTAK Registry), we investigated CMR imaging data of 58 patients (56 women, mean age 68 ± 12 years) with TTS. CMR imaging was performed in the acute to subacute phase (median time after symptom onset 4 days) of TTS. TA of the left ventricle was performed using free-hand regions-of-interest in short axis late gadolinium-enhanced and on T2-weighted (T2w) images. A total of 608 TA features adding the parameters age, gender, and body mass index were included. Dimension reduction was performed removing TA features with poor intra-class correlation coefficients (ICC ≤ 0.6) and those being redundant (correlation matrix with Pearson correlation coefficient r > 0.8). Five common machine-learning classifiers (artificial neural network Multilayer Perceptron, decision tree J48, NaïveBayes, RandomForest, and Sequential Minimal Optimization) with tenfold cross-validation were applied to assess 5-year outcome including major adverse cardiac and cerebrovascular events (MACCE). Dimension reduction yielded 10 TA features carrying prognostic information, which were all based on T2w images. The NaïveBayes machine learning classifier showed overall best performance with a sensitivity of 82.9% (confidence interval (CI) 80-86.2), specificity of 83.7% (CI 75.7-92), and an area-under-the receiver operating characteristics curve of 0.88 (CI 0.83-0.92). This proof-of-principle study is the first to identify unique T2w-derived TA features that predict long-term outcome in patients with TTS. These features might serve as imaging prognostic biomarkers in TTS patients.
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European heart journal 41(34) 3255-3268 2020年9月7日 査読有りAIMS: Takotsubo syndrome (TTS) is an acute heart failure syndrome, which shares many features with acute coronary syndrome (ACS). Although TTS was initially described with angiographically normal coronary arteries, smaller studies recently indicated a potential coexistence of coronary artery disease (CAD) in TTS patients. This study aimed to determine the coexistence, features, and prognostic role of CAD in a large cohort of patients with TTS. METHODS AND RESULTS: Coronary anatomy and CAD were studied in patients diagnosed with TTS. Inclusion criteria were compliance with the International Takotsubo Diagnostic Criteria for TTS, and availability of original coronary angiographies with ventriculography performed during the acute phase. Exclusion criteria were missing views, poor quality of angiography loops, and angiography without ventriculography. A total of 1016 TTS patients were studied. Of those, 23.0% had obstructive CAD, 41.2% had non-obstructive CAD, and 35.7% had angiographically normal coronary arteries. A total of 47 patients (4.6%) underwent percutaneous coronary intervention, and 3 patients had acute and 8 had chronic coronary artery occlusion concomitant with TTS, respectively. The presence of CAD was associated with increased incidence of shock, ventilation, and death from any cause. After adjusting for confounders, the presence of obstructive CAD was associated with mortality at 30 days. Takotsubo syndrome patients with obstructive CAD were at comparable risk for shock and death and nearly at twice the risk for ventilation compared to an age- and sex-matched ACS cohort. CONCLUSIONS: Coronary artery disease frequently coexists in TTS patients, presents with the whole spectrum of coronary pathology including acute coronary occlusion, and is associated with adverse outcome. TRIAL REGISTRATION: ClinicalTrials.gov number: NCT01947621.
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Journal of the American College of Cardiology 75(16) 1869-1877 2020年4月28日 査読有りBACKGROUND: Takotsubo syndrome (TTS) occurs predominantly in post-menopausal women but is also found in younger patients. OBJECTIVES: This study aimed to investigate age-related differences in TTS. METHODS: Patients diagnosed with TTS and enrolled in the International Takotsubo Registry between January 2011 and February 2017 were included in this analysis and were stratified by age (younger: ≤50 years, middle-age: 51 to 74 years, elderly: ≥75 years). Baseline characteristics, hospital course, as well as short- and long-term mortality were compared among groups. RESULTS: Of 2,098 TTS patients, 242 (11.5%) patients were ≤50 years of age, 1,194 (56.9%) were 51 to 74 years of age, and 662 (31.6%) were ≥75 years of age. Younger patients were more often men (12.4% vs. 10.9% vs. 6.3%; p = 0.002) and had an increased prevalence of acute neurological (16.3% vs. 8.4% vs. 8.8%; p = 0.001) or psychiatric disorders (14.1% vs. 10.3% vs. 5.6%; p < 0.001) compared with middle-aged and elderly TTS patients. Furthermore, younger patients had more often cardiogenic shock (15.3% vs. 9.1% vs. 8.1%; p = 0.004) and had a numerically higher in-hospital mortality (6.6% vs. 3.6% vs. 5.1%; p = 0.07). At multivariable analysis, younger (odds ratio: 1.60; 95% confidence interval: 0.86 to 3.01; p = 0.14) and older age (odds ratio: 1.09; 95% confidence interval: 0.66 to 1.80; p = 0.75) were not independently associated with in-hospital mortality using the middle-aged group as a reference. There were no differences in 60-day mortality rates among groups. CONCLUSIONS: A substantial proportion of TTS patients are younger than 50 years of age. TTS is associated with severe complications requiring intensive care, particularly in younger patients.
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Impact of aspirin on takotsubo syndrome: a propensity score-based analysis of the InterTAK Registry.European journal of heart failure 22(2) 330-337 2020年2月 査読有りAIMS: The aim of the present study was to investigate the impact of aspirin on prognosis in takotsubo syndrome (TTS). METHODS AND RESULTS: Patients from the International Takotsubo (InterTAK) Registry were categorized into two groups based on aspirin prescription at discharge. A comparison of clinical outcomes between groups was performed using an adjusted analysis with propensity score (PS) stratification; results from the unadjusted analysis were also reported to note the effect of the PS adjustment. Major adverse cardiac and cerebrovascular events (MACCE: a composite of death, myocardial infarction, TTS recurrence, stroke or transient ischaemic attack) were assessed at 30-day and 5-year follow-up. A total of 1533 TTS patients with known status regarding aspirin prescription at discharge were included. According to the adjusted analysis based on PS stratification, aspirin was not associated with a lower hazard of MACCE at 30-day [hazard ratio (HR) 1.24, 95% confidence interval (CI) 0.50-3.04, P = 0.64] or 5-year follow-up (HR 1.11, 95% CI 0.78-1.58, P = 0.58). These results were confirmed by sensitivity analyses performed with alternative PS-based methods, i.e. covariate adjustment and inverse probability of treatment weighting. CONCLUSION: In the present study, no association was found between aspirin use in TTS patients and a reduced risk of MACCE at 30-day and 5-year follow-up. These findings should be confirmed in adequately powered randomized controlled trials. ClinicalTrials.gov Identifier: NCT01947621.
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Journal of the American Heart Association 8(21) e011194 2019年11月5日 査読有りBackground Left ventricular (LV) recovery in takotsubo syndrome (TTS) occurs over a wide-ranging interval, varying from hours to weeks. We sought to investigate the clinical predictors and prognostic impact of recovery time for TTS patients. Methods and Results TTS patients from the International Takotsubo Registry were included in this study. Cut-off for early LV recovery was determined to be 10 days after the acute event. Multivariable logistic regression was used to assess factors associated with the absence of early recovery. In-hospital outcomes and 1-year mortality were compared for patients with versus without early recovery. We analyzed 406 patients with comprehensive and serial imaging data regarding time to recovery. Of these, 191 (47.0%) had early LV recovery and 215 (53.0%) demonstrated late LV improvement. Patients without early recovery were more often male (12.6% versus 5.2%; P=0.011) and presented more frequently with typical TTS (76.3% versus 67.0%, P=0.040). Cardiac and inflammatory markers were higher in patients without early recovery than in those with early recovery. Patients without early recovery showed unfavorable 1-year outcome compared with patients with early recovery (P=0.003). On multiple logistic regression, male sex, LV ejection fraction <45%, and acute neurologic disorders were associated with the absence of early recovery. Conclusions TTS patients without early LV recovery have different clinical characteristics and less favorable 1-year outcome compared with patients with early recovery. The factors associated with the absence of early recovery included male sex, reduced LV ejection fraction, and acute neurologic events. Clinical Trial Registration URL: http://www.clinicaltrials.gov. Unique identifier: NCT01947621.
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European journal of heart failure 21(11) 1469-1472 2019年11月 査読有り
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Journal of the American Heart Association 8(15) e010881 2019年8月6日 査読有りBackground Clinical characteristics and outcomes of takotsubo syndrome (TTS) patients with malignancy have not been fully elucidated. This study sought to explore differences in clinical characteristics and to investigate short- and long-term outcomes in TTS patients with or without malignancy. Methods and Results TTS patients were enrolled from the International Takotsubo Registry. The TTS cohort was divided into patients with and without malignancy to investigate differences in clinical characteristics and to assess short- and long-term mortality. A subanalysis was performed comparing long-term mortality between a subset of TTS patients with or without malignancy and acute coronary syndrome (ACS) patients with or without malignancy. Malignancy was observed in 16.6% of 1604 TTS patients. Patients with malignancy were older and more likely to have physical triggers, but less likely to have emotional triggers compared with those without malignancy. Long-term mortality was higher in patients with malignancy (P<0.001), while short-term outcome was comparable (P=0.17). In a subanalysis, long-term mortality was comparable between TTS patients with malignancies and ACS patients with malignancies (P=0.13). Malignancy emerged as an independent predictor of long-term mortality. Conclusions A substantial number of TTS patients show an association with malignancy. History of malignancy might increase the risk for TTS, and therefore, appropriate screening for malignancy should be considered in these patients. Clinical Trial Registration URL: http://www.clinicaltrial.gov. Unique identifier: NCT01947621.
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European heart journal 40(26) 2142-2151 2019年7月1日 査読有りAIMS: We aimed to evaluate the frequency, clinical features, and prognostic implications of cardiac arrest (CA) in takotsubo syndrome (TTS). METHODS AND RESULTS: We reviewed the records of patients with CA and known heart rhythm from the International Takotsubo Registry. The main outcomes were 60-day and 5-year mortality. In addition, predictors of mortality and predictors of CA during the acute TTS phase were assessed. Of 2098 patients, 103 patients with CA and known heart rhythm during CA were included. Compared with patients without CA, CA patients were more likely to be younger, male, and have apical TTS, atrial fibrillation (AF), neurologic comorbidities, physical triggers, and longer corrected QT-interval and lower left ventricular ejection fraction on admission. In all, 57.1% of patients with CA at admission had ventricular fibrillation/tachycardia, while 73.7% of patients with CA in the acute phase had asystole/pulseless electrical activity. Patients with CA showed higher 60-day (40.3% vs. 4.0%, P < 0.001) and 5-year mortality (68.9% vs. 16.7%, P < 0.001) than patients without CA. T-wave inversion and intracranial haemorrhage were independently associated with higher 60-day mortality after CA, whereas female gender was associated with lower 60-day mortality. In the acute phase, CA occurred less frequently in females and more frequently in patients with AF, ST-segment elevation, and higher C-reactive protein on admission. CONCLUSIONS: Cardiac arrest is relatively frequent in TTS and is associated with higher short- and long-term mortality. Clinical and electrocardiographic parameters independently predicted mortality after CA.
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European heart journal. Quality of care & clinical outcomes 5(2) 88-89 2019年4月1日 査読有り招待有り筆頭著者
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Journal of the American College of Cardiology 73(8) 982-984 2019年3月5日 査読有り筆頭著者
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Circulation 139(3) 413-415 2019年1月15日 査読有り
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Journal of the American College of Cardiology 72(23 Pt A) 2942-2944 2018年12月11日 査読有り招待有り筆頭著者
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Heart and vessels 33(10) 1214-1219 2018年10月 査読有り筆頭著者責任著者Takotsubo syndrome (TTS) has been recognized as a benign condition mainly due to its reversibility. However, recent researches have demonstrated that serious cardiac complications could occur during hospitalization. Thus, the aim of this study is to detect factors associated with in-hospital cardiac complications in patients with TTS. A total of 154 consecutive patients with TTS were enrolled retrospectively. In-hospital cardiac complications were observed in 61 patients (40%), including 44 patients with pulmonary edema (29%) and 25 patients with cardiogenic shock (16%). Multivariate logistic regression analysis identified lower systolic blood pressure on admission (OR 0.97, 95% CI 0.96-0.99, p = 0.001), history of diabetes mellitus (OR 2.92, 95% CI 1.01-8.41, p = 0.04), and β-blocker use before admission (OR 16.9, 95% CI 1.57-181.7, p = 0.006) as independent predictors of in-hospital cardiac complications, while chest pain at onset was identified as a negative predictor of cardiac complications during hospitalization (OR 0.20, 95% CI 0.07-0.55, p = 0.001). Patients with cardiac complications more often needed hemodynamic support and longer hospital stay than those without (21.2 ± 19.4 vs. 11.8 ± 16.8 days, p = 0.002). TTS should be no longer recognized as a benign disease, but requiring careful management. We should obtain vital signs and patient's medical history carefully as soon as possible after admission to predict in-hospital cardiac complications.
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Journal of the American College of Cardiology 72(8) 874-882 2018年8月21日 査読有り筆頭著者BACKGROUND: Prognosis of Takotsubo syndrome (TTS) remains controversial due to scarcity of available data. Additionally, the effect of the triggering factors remains elusive. OBJECTIVES: This study compared prognosis between TTS and acute coronary syndrome (ACS) patients and investigated short- and long-term outcomes in TTS based on different triggers. METHODS: Patients with TTS were enrolled from the International Takotsubo Registry. Long-term mortality of patients with TTS was compared to an age- and sex-matched cohort of patients with ACS. In addition, short- and long-term outcomes were compared between different groups according to triggering conditions. RESULTS: Overall, TTS patients had a comparable long-term mortality risk with ACS patients. Of 1,613 TTS patients, an emotional trigger was detected in 485 patients (30%). Of 630 patients (39%) related to physical triggers, 98 patients (6%) had acute neurologic disorders, while in the other 532 patients (33%), physical activities, medical conditions, or procedures were the triggering conditions. The remaining 498 patients (31%) had no identifiable trigger. TTS patients related to physical stress showed higher mortality rates than ACS patients during long-term follow-up, whereas patients related to emotional stress had better outcomes compared with ACS patients. CONCLUSIONS: Overall, TTS patients had long-term outcomes comparable to age- and sex-matched ACS patients. Also, we demonstrated that TTS can either be benign or a life-threating condition depending on the inciting stress factor. We propose a new classification based on triggers, which can serve as a clinical tool to predict short- and long-term outcomes of TTS. (International Takotsubo Registry [InterTAK Registry]; NCT01947621).
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JOURNAL OF CARDIOLOGY 72(1-2) 177-177 2018年7月 査読有り招待有り筆頭著者責任著者
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European journal of heart failure 20(6) 1021-1030 2018年6月 査読有りAIMS: The present study aimed to determine the prognostic impact of resting heart rate (HR) and systolic blood pressure (SBP) in takotsubo syndrome (TTS). METHODS AND RESULTS: Patients from the International Takotsubo Registry with complete data on HR and SBP were enrolled. We analysed all-cause mortality and major adverse cardiac and cerebrovascular events (MACCE) in tertiles of HR (<77 b.p.m., 77-94 b.p.m., >94 b.p.m.) and SBP (<119 mmHg, 119-140 mmHg, >140 mmHg). In addition, linear splines with interactions between HR and SBP were analysed. The risk of all-cause mortality was higher in the second HR tertile (1.89, 1.15-3.10; P = 0.012) and the third HR tertile (3.01, 1.90-4.79; P < 0.001) than in the first tertile. Similar effects were observed for MACCE. Low SBP was related to an increased risk of all-cause mortality (P < 0.001) and MACCE (P = 0.002). In a multivariable analysis of all-cause mortality, at HR >70 b.p.m., every 1 b.p.m. increase in HR was associated with a 1.7% increase (P < 0.001), and every 1 mmHg increase in SBP up to 130 mmHg was associated with a 2% risk reduction (P < 0.001). The risk of all-cause mortality thus was particularly elevated when low SBP occurred together with high HR. CONCLUSIONS: High HR and low SBP are associated with an increased risk of all-cause mortality in TTS. HR reduction might be worthy of being investigated as a therapeutic strategy for this condition and high HR and low SBP can be used to evaluate risk in this acute presentation of TTS. CLINICAL TRIAL REGISTRATION: ClinicalTrials.gov NCT01947621.
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JOURNAL OF CARDIOLOGY 71(1-2) 110-110 2018年1月 査読有り招待有り筆頭著者責任著者
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Cardiovascular intervention and therapeutics 33(1) 97-98 2018年1月 査読有り
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Journal of cardiology 70(6) 615-619 2017年12月 査読有り筆頭著者責任著者BACKGROUND: Prevalence of myocardial bridging of the left anterior descending coronary artery (LAD) in patients with takotsubo syndrome (TTS) has been demonstrated. However, the impact of myocardial bridging on in-hospital outcome has not been fully evaluated. METHODS: A total of 144 consecutive patients with TTS were enrolled. Coronary angiography and left ventriculography were performed in all patients and absence of obstructive coronary disease explaining the left ventricular contraction abnormality was confirmed. Myocardial bridging was diagnosed when a dynamic compression in systole, so-called "milking effect", was observed in the LAD. We evaluated differences in the clinical characteristics and in-hospital outcome between patients with and without myocardial bridging. Furthermore, multiple logistic regression analysis was performed to predict in-hospital death. RESULTS: Myocardial bridging was observed in 33 patients (23%). In-hospital death was more frequent in patients with myocardial bridging (21% vs. 6%, p=0.02), which was due mainly to a higher non-cardiac death in those patients (15% vs. 5%, p=0.049). Multiple logistic regression analysis demonstrated myocardial bridging (odds ratio=12.0, 95% CI=2.52-78.5, p<0.01) as one of the independent predictors of in-hospital death. CONCLUSION: Myocardial bridging is an independent predictor of in-hospital death in patients with TTS.
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Heart (British Cardiac Society) 103(18) 1461-1469 2017年9月 査読有り筆頭著者
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Circulation journal : official journal of the Japanese Circulation Society 81(9) 1368-1369 2017年8月25日 査読有り筆頭著者責任著者
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ESC heart failure 4(1) 78-78 2017年2月 査読有り筆頭著者責任著者
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International journal of cardiology 224 157-161 2016年12月1日 査読有り筆頭著者責任著者
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Circulation journal : official journal of the Japanese Circulation Society 80(9) 2059-2059 2016年8月25日 査読有り招待有り筆頭著者責任著者
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Circulation journal : official journal of the Japanese Circulation Society 80(8) 1824-9 2016年7月25日 査読有り筆頭著者責任著者BACKGROUND: Because it is difficult to distinguish between focal takotsubo cardiomyopathy and aborted myocardial infarction, there is little information about the prevalence and clinical features of focal takotsubo cardiomyopathy. METHODS AND RESULTS: Our cardiac catheterization databases were queried to identify patients with focal takotsubo cardiomyopathy and other types of takotsubo cardiomyopathy. We defined focal takotsubo cardiomyopathy as hypo-, a- or dyskinesis in both anterolateral and septal segments without obstructive coronary artery disease explaining the wall motion abnormality. A total of 10 patients were diagnosed with focal takotsubo cardiomyopathy. The control group comprised patients with takotsubo cardiomyopathy with apical, mid-ventricular, or basal ballooning. Clinical features and in-hospital outcomes were compared between patients with focal takotsubo cardiomyopathy and those with other types of takotsubo cardiomyopathy. Among the 144 patients with takotsubo cardiomyopathy, the apical, mid-ventricular, basal, and focal types occurred in 85 (59.0%), 49 (34.0%), 0 (0%), and 10 patients (6.9%), respectively. The left ventricular ejection fraction was significantly higher in the focal group compared with the apical and mid-ventricular group (56±13 vs. 45±13 vs. 46±12%, P=0.03). In-hospital outcome was not significantly different among the 3 groups. CONCLUSIONS: Focal takotsubo cardiomyopathy is not rare. Biplane left ventriculography is useful for its diagnosis. (Circ J 2016; 80: 1824-1829).
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Journal of cardiology cases 14(1) 21-23 2016年7月 査読有り筆頭著者責任著者Although apical ballooning is the most common morphological type of takotsubo cardiomyopathy, variants have been reported. Several case reports have demonstrated focal takotsubo cardiomyopathy. Most cases had left ventricular wall motion abnormality in the anterolateral segment. We present a case of focal ventricular ballooning localized especially in the inferior mid-ventricular segment. <Learning objective: Focal takotsubo cardiomyopathy localized especially in the inferior mid-ventricular segment is rare. However, it is important to distinguish focal takotsubo cardiomyopathy from acute coronary syndrome because patient follow-up and medical management are different. Cardiac magnetic resonance imaging is useful to make a definitive diagnosis for focal takotsubo cardiomyopathy.>.
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European heart journal. Cardiovascular Imaging 16(12) 1406-1406 2015年12月 査読有り筆頭著者責任著者
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The international journal of cardiovascular imaging 31(5) 1019-1019 2015年6月 査読有り招待有り筆頭著者責任著者
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The international journal of cardiovascular imaging 31(4) 821-2 2015年4月 査読有り筆頭著者
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The international journal of cardiovascular imaging 30(8) 1417-8 2014年12月 査読有り筆頭著者責任著者
MISC
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日本臨床生理学会雑誌 52(3) 137-144 2022年8月 査読有り背景:職種による日常業務の違いが高血圧の発症に関係しているかに関しては、十分に解明されていない。対象と方法:東武鉄道社員のうち2010年度の定期健康診断にて無治療で血圧が正常であり、かつ2020年度の健康診断における血圧値が確認できた2,357名を対象とし、2020年度も無治療で正常血圧であった1,879名(正常血圧維持群)と高血圧と判定された478名(高血圧発症群)に分けて特徴を調べた。高血圧発症に関連する可能性のある因子として、同時期に測定されたBMI、尿酸値、HbA1c値、LDL-コレステロール値、eGFR値および別途行ったストレスチェックテストの成績を取り上げ、主として従事している業務によって事務系社員、駅務員、エンジニア、乗務員の4群に分けて比較検討した。結果:(1)高血圧発症率は事務系社員14%、駅務員15.8%、エンジニア19%、乗務員25.2%で、乗務員において他の職種より有意に高かった。(2)高血圧発症群では正常血圧維持群に比して、事務系社員では年齢、BMIおよび尿酸値の増加率、駅務員では年齢のみ、乗務員ではBMIと尿酸値の増加率がそれぞれ有意に高かった。(3)2020年度における年齢(Age≧50)、肥満(BMI≧25)、高尿酸(UA≧8.0)、高血糖(HbA1c≧6.5)、高脂質(LDL-C≧160)、腎機能低下(eGFR<60)と高血圧発症との関連性を多変量解析で見たところ、乗務員において肥満と高尿酸が、事務系社員および駅務員において肥満がそれぞれ独立した危険因子であった。(4)ストレスチェックにおいて、高血圧発症に及ぼす高ストレスの関与は乗務員においてのみ有意であった。結論:高血圧の発症には肥満や高尿酸血症のほか高ストレスが関係していたが、その関与の仕方には職種による差があった。(著者抄録)
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日本循環器学会学術集会抄録集 86回 JO11-4 2022年3月
書籍等出版物
1共同研究・競争的資金等の研究課題
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日本学術振興会 科学研究費助成事業 若手研究 2022年4月 - 2025年3月