Japanese circulation journal最新文献_第2页

Stress-induced ST-segment elevation following myocardial infarction and its role in wall motion abnormality, myocardial ischemia and viability: comparison of response to exercise, dobutamine and dipyridamole. 心肌梗死后应激性st段抬高及其在壁运动异常、心肌缺血和活力中的作用:运动、多巴酚丁胺和双嘧达莫反应的比较

Japanese circulation journal Pub Date : 2001-11-20 DOI: 10.1253/JCJ.65.1029

T. Yamamoto, T. Miyazaki, Y. Hirano, K. Ishikawa

{"title":"Stress-induced ST-segment elevation following myocardial infarction and its role in wall motion abnormality, myocardial ischemia and viability: comparison of response to exercise, dobutamine and dipyridamole.","authors":"T. Yamamoto, T. Miyazaki, Y. Hirano, K. Ishikawa","doi":"10.1253/JCJ.65.1029","DOIUrl":"https://doi.org/10.1253/JCJ.65.1029","url":null,"abstract":"Stress-induced ST-segment elevation following myocardial infarction (MI) has been correlated with myocardial ischemia, viability and wall motion abnormality, but its mechanism is still unclear, so the present study compared ST-segment elevation and wall motion response during exercise, dobutamine and dipyridamole stresses. Twenty-five patients with their first anterior MI underwent exercise, dobutamine and dipyridamole echocardiography on different days 4-6 weeks after MI. Left ventricular wall motion was analyzed using 5-grade/16-segment model and myocardial ischemia was considered as a worsening of the wall motion score index (WMSI) during the stress test; myocardial viability was defined as a reduction of WMSI during low dose dobutamine. Dyskinesis formation was defined by visual analysis as akinesis that became dyskinetic or if the dyskinesis worsened. Both exercise and dobutamine induced ST-segment elevation, but dipyridamole did not. There was no significant difference in the degree of ST-segment elevation between the patients with and without myocardial ischemia or dyskinesis formation. Exercise induced a higher ST-segment elevation in patients with myocardial viability than those without (0.17+/-0.09 mV vs 0.09+/-0.07 mV, p<0.05). Exercise-induced ST-segment elevations correlated with dobutamine-induced ST-segment elevations (p<0.01), changes in heart rate (p<0.05) and systolic blood pressure (p<0.05). In conclusions, stress-induced ST-segment elevation does not correlate with either myocardial ischemia or stress-induced dyskinesis, but may be associated with myocardial viability.","PeriodicalId":14544,"journal":{"name":"Japanese circulation journal","volume":"22 1","pages":"1029-33"},"PeriodicalIF":0.0,"publicationDate":"2001-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91176685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Vagal stimulation prior to atrial rapid pacing protects the atrium from electrical remodeling in anesthetized dogs. 迷走神经刺激前心房快速起搏保护心房电重构麻醉狗。

Japanese circulation journal Pub Date : 2001-11-20 DOI: 10.1253/JCJ.65.1077

M. Takei, M. Tsuboi, T. Usui, T. Hanaoka, F. Kurogouchi, M. Aruga, Y. Katagiri, M. Owa, K. Kubo, K. Kiyosawa

{"title":"Vagal stimulation prior to atrial rapid pacing protects the atrium from electrical remodeling in anesthetized dogs.","authors":"M. Takei, M. Tsuboi, T. Usui, T. Hanaoka, F. Kurogouchi, M. Aruga, Y. Katagiri, M. Owa, K. Kubo, K. Kiyosawa","doi":"10.1253/JCJ.65.1077","DOIUrl":"https://doi.org/10.1253/JCJ.65.1077","url":null,"abstract":"Atrial electrical remodeling is thought to be the cause of the maintenance of atrial fibrillation (AF). Although the initiation and maintenance of AF is partially associated with autonomic nervous tone, vagally mediated AF does not tend to become permanent. Therefore, the effects of preceding vagal stimulation (VS) on the atrial effective refractory period (ERP) under electrical remodeling conditions were investigated in anesthetized dogs. Atrial ERPs were measured at 5 sites before and after a 7-h period of atrial rapid pacing in the control group. In the VS group, the vagus nerve was stimulated for 20 min before a period of atrial rapid pacing. Atrial rapid pacing shortened the ERP at each site in the control group (electrical remodeling). On the other hand, atrial rapid pacing after VS did not shorten the ERP at any site in the VS group. Tetrodotoxin, which was administered into the fatty tissue overlying the right atrial side of the right pulmonary vein junctions, blocked the protective effect of VS against the shortening of the ERP induced by atrial rapid pacing. In contrast, atropine did not interfere with such protective effects. These results suggest that VS prior to atrial rapid pacing protects the atrium from atrial electrical remodeling.","PeriodicalId":14544,"journal":{"name":"Japanese circulation journal","volume":"13 1","pages":"1077-81"},"PeriodicalIF":0.0,"publicationDate":"2001-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84083636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 20

Relationship between cardiac 123I-metaiodobenzylguanidine imaging and the transcardiac gradient of neurohumoral factors in patients with dilated cardiomyopathy. 扩张型心肌病患者心脏123I-metaiodobenzylguanidine显像与经心神经体液因子梯度的关系。

Japanese circulation journal Pub Date : 2001-11-01 DOI: 10.1253/JCJ.65.1041

T. Matsui, T. Tsutamoto, M. Kinoshita

{"title":"Relationship between cardiac 123I-metaiodobenzylguanidine imaging and the transcardiac gradient of neurohumoral factors in patients with dilated cardiomyopathy.","authors":"T. Matsui, T. Tsutamoto, M. Kinoshita","doi":"10.1253/JCJ.65.1041","DOIUrl":"https://doi.org/10.1253/JCJ.65.1041","url":null,"abstract":"Cardiac sympathetic nervous function is altered in congestive heart failure (CHF) and the uptake and washout rate of cardiac 123I-metaiodobenzylguanidine (MIBG) are useful markers for evaluating the severity of it. To assess what parameters predict decreased uptake or increased washout rate of MIBG, the concentrations of neurohumoral factor in both the aorta (Ao) and coronary sinus (CS) were measured, as well as hemodynamic parameters by catheterization, in patients with dilated cardiomyopathy (DCM). MIBG imaging was performed within 1 week of cardiac catheterization. Regarding MIBG parameters, the correlation with the transcardiac gradient of norepinephrine (NE), brain natriuretic peptide (BNP) and hemodynamics was investigated. Stepwise multivariate regression analysis was used to determine which variables closely correlated with cardiac MIBG parameters. There was a significant increase in the NE level between the Ao (446 pg/ml) and the CS (727 pg/ml). According to stepwise multivariate regression analysis, the heart/mediastinum (H/M) ratio independently correlated with the transcardiac gradient of BNP (r=-0.480, p<0.01), and the washout rate independently correlated with the transcardiac gradient of NE (r=0.481, p<0.01). These findings indicate that the H/M ratio may reflect the transcardiac gradient of BNP, which implies the degree of left ventricular dysfunction and/or damage and the washout rate may reflect altered cardiac sympathetic nerve terminal in DCM patients with CHF, suggesting that both the H/M ratio and washout rate provide important information about the failing ventricle.","PeriodicalId":14544,"journal":{"name":"Japanese circulation journal","volume":"83 1","pages":"1041-6"},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86903429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Coronary revascularization in Japan. Part 2: comparison of facilities between 1997 and 1999. 日本的冠状动脉重建术。第二部分:一九九七年与一九九九年的设施比较。

Japanese circulation journal Pub Date : 2001-11-01 DOI: 10.1253/JCJ.65.1011

M. Tsuchihashi, H. Tsutsui, M. Shihara, H. Shigematsu, S. Yamamoto, G. Koike, S. Kono, A. Takeshita

{"title":"Coronary revascularization in Japan. Part 2: comparison of facilities between 1997 and 1999.","authors":"M. Tsuchihashi, H. Tsutsui, M. Shihara, H. Shigematsu, S. Yamamoto, G. Koike, S. Kono, A. Takeshita","doi":"10.1253/JCJ.65.1011","DOIUrl":"https://doi.org/10.1253/JCJ.65.1011","url":null,"abstract":"A nation-wide survey on the procedures and facilities of coronary revascularization, percutaneous coronary intervention (PCI) and coronary artery bypass grafting (CABG) conducted by the Japanese Coronary Intervention Study (JCIS) group during 1997 revealed that PCI is more often used than CABG and is mainly carried out in low-volume facilities without surgical backup. The present study aimed to investigate the temporal changes in the usage of revascularization therapies and facilities from 1997 to 1999. A questionnaire was mailed in 1998 to the delegates of 1,086 PCI and 582 CABG facilities identified by the previous survey, and 89% of PCIs surveyed and 94% of CABGs surveyed reported back. The number of PCI procedures had increased by 19% from 97,831 to 116,479 and that of CABG procedures also increased by 21% from 16,374 to 19,846. The ratio of PCI to CABG was 5.9 in 1999, showing no significant change from 6.0 in 1997. In parallel, the number of PCI and CABG facilities increased from 888 to 941 and from 442 to 453, respectively. The use of coronary stents and other interventional devices increased during these 2 years. Coronary stents were used regardless of the annual procedural volume of the facilities, whereas other interventional devices, directional and rotational coronary atherectomy, were used mainly in the high-volume laboratories (p<0.01). Beating-heart, off-pump CABG had increased from 2% to 11% of total cases. Continued monitoring of trends in PCI and CABG facilities and procedures will be needed for nation-wide assessment of the use of new technology.","PeriodicalId":14544,"journal":{"name":"Japanese circulation journal","volume":"35 1","pages":"1011-6"},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85424980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Subthreshold stimulation in three types of reentrant supraventricular tachycardia: correlation with the results of catheter ablation. 三种可重入性室上性心动过速的阈下刺激:与导管消融结果的相关性。

Japanese circulation journal Pub Date : 2001-11-01 DOI: 10.1253/JCJ.65.1057

N. Ueda, Y. Kaji, T. Maruyama, E. Shimoike, H. Ito, T. Fujino, Y. Niho, M. Harada

{"title":"Subthreshold stimulation in three types of reentrant supraventricular tachycardia: correlation with the results of catheter ablation.","authors":"N. Ueda, Y. Kaji, T. Maruyama, E. Shimoike, H. Ito, T. Fujino, Y. Niho, M. Harada","doi":"10.1253/JCJ.65.1057","DOIUrl":"https://doi.org/10.1253/JCJ.65.1057","url":null,"abstract":"The effects of subthreshold stimulation (STS) by direct current were investigated in 20 patients with atrioventricular nodal reentrant tachycardia (AVNRT), 27 with atrioventricular reentrant tachycardia (AVRT) and 3 with idiopathic atrial reentrant tachycardia (IART) STS was delivered to each eligible site for ablation prior to radiofrequency application. STS was defined as 'positive' if it could terminate the tachycardia or disrupt the conduction of accessory pathways without myocardial capture and defined as 'negative' if it could not. Radiofrequency ablation was performed irrespective of a positive or negative result from STS and was successful in all 50 patients. Among the 50 successful ablation sites, STS was positive at 26 sites (11 sites in AVNRT, 12 in AVRT and 3 in IART). STS was positive at 4 sites where ablation failed in 3 patients with AVRT and was negative at 8 sites where ablation was successful in 4 patients with AVNRT and 4 with AVRT. The positive and negative predictive value of STS for the detection of the optimal ablation site were, respectively, 100% and 74% in AVNRT, 73% and 72% in AVRT, and both 100% in IART STS-guided mapping is a specific method to predict the successful catheter ablation of reentrant supraventricular tachycardia.","PeriodicalId":14544,"journal":{"name":"Japanese circulation journal","volume":"26 1","pages":"1057-63"},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76786722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Evaluation of left atrial function by the functional volume change curve derived from Doppler flow spectra. 由多普勒血流谱导出的功能容积变化曲线评价左心房功能。

Japanese circulation journal Pub Date : 2001-11-01 DOI: 10.1253/JCJ.65.953

F. Nakao, Y. Wasaki, M. Kimura, T. Iwami, H. Iida, T. Wakeyama, T. Miura, H. Ogawa, M. Matsuzaki

{"title":"Evaluation of left atrial function by the functional volume change curve derived from Doppler flow spectra.","authors":"F. Nakao, Y. Wasaki, M. Kimura, T. Iwami, H. Iida, T. Wakeyama, T. Miura, H. Ogawa, M. Matsuzaki","doi":"10.1253/JCJ.65.953","DOIUrl":"https://doi.org/10.1253/JCJ.65.953","url":null,"abstract":"The objective of this study was to clarify the left atrial (LA) reservoir and booster pump function in patients with left ventricular (LV) diastolic dysfunction. To determine LA reservoir and booster pump function, a new algorithm to determine LA functional volume change curve (FVC) was developed from Doppler flow spectra of pulmonary venous flow and LV inflow by transthoracic echocardiography in 110 patients. Patients were classified into normal (N), and abnormal (AB) and pseudonormal (PN) groups on the basis of their Doppler flow patterns. From the indices of FVC, atrial reservoir volume (ARV), passive emptying volume (PEV) and active emptying volume (AEV) were obtained. ARV/stroke volume (SV) was increased in the AB group, but decreased in the PN group compared with N (N, 0.61+/-0.09; AB, 0.73+/-0.10; PN, 0.52+/-0.13, p<0.05). PEV/SV was significantly decreased in AB, but increased in PN compared with N (N, 0.27+/-0.07; AB, 0.19+/-0.07; PN, 0.31+/-0.18, p<0.05). AEV/SV was significantly increased in AB, but decreased in PN compared with N (N, 0.41+/-0.08; AB, 0.56+/-0.10; PN, 0.26+/-0.19, p<0.05). Thus, in patients with an abnormal relaxation pattern, the LA reservoir and booster pump function are augmented, but in patients with a pseudonormal pattern, both LA reservoir and booster pump function are deteriorated, suggesting a vulnerability to pulmonary congestion.","PeriodicalId":14544,"journal":{"name":"Japanese circulation journal","volume":"1 1","pages":"953-7"},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89964998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

'No-Touch' isolation procedure for ruptured mycotic abdominal aortic aneurysm. 破裂真菌性腹主动脉瘤的“非接触”隔离术。

Japanese circulation journal Pub Date : 2001-11-01 DOI: 10.1253/JCJ.65.1085

K. Tanaka, M. Kawauchi, Y. Murota, A. Furuse

引用次数: 14

Clinical characteristics of rapid atrial fibrillation preceding ventricular tachycardia. 室性心动过速前快速房颤的临床特点。

Japanese circulation journal Pub Date : 2001-11-01 DOI: 10.1253/JCJ.65.1022

H. Konagai, J. Nitta, A. Niwa, Y. Satoh, A. Nogami, K. Aonuma, Y. Lesaka, M. Hiroe, F. Marumo

引用次数: 5

Assessment of left ventricular systolic function using contrast two-dimensional echocardiography with a high-frequency transducer in the awake murine model of myocardial infarction. 用高频换能器对比二维超声心动图评价清醒小鼠心肌梗死模型左心室收缩功能。

Japanese circulation journal Pub Date : 2001-11-01 DOI: 10.1253/JCJ.65.979

K. Suehiro, S. Takuma, J. Shimizu, T. Hozumi, H. Yano, C. Cardinale, M. DiTullio, Jie Wang, Craig R. Smith, D. Burkhoff, S. Homma

{"title":"Assessment of left ventricular systolic function using contrast two-dimensional echocardiography with a high-frequency transducer in the awake murine model of myocardial infarction.","authors":"K. Suehiro, S. Takuma, J. Shimizu, T. Hozumi, H. Yano, C. Cardinale, M. DiTullio, Jie Wang, Craig R. Smith, D. Burkhoff, S. Homma","doi":"10.1253/JCJ.65.979","DOIUrl":"https://doi.org/10.1253/JCJ.65.979","url":null,"abstract":"The estimation of global left ventricular function using M-mode echocardiography has technical limitations in the murine model of myocardial infarction (MI), but the recent improvements in 2-dimensional (2-D) echocardiography using a high-frequency transducer provide more accessible images. Furthermore, intravenous injection of contrast agent has the additional benefit of enhancing the endocardial border in the murine heart. The present study was designed to evaluate the value of 2-D echocardiography with intravenous injection of contrast agent in the assessment of global systolic function of the murine heart with MI. Two-dimensional and M-mode echocardiography without and with intravenous injection of contrast agent (Optison, 0.1-0.15 ml) were performed in 76 awake mice 2 days before and 2 days after left coronary artery ligation. Fractional shortening (FS) was calculated from the end-diastolic and end-systolic diameters on M-mode echocardiography, and fractional area change (FAC) from the end-diastolic and end-systolic areas on 2-D echocardiography. Both FS and FAC were compared with the areas of hypoperfusion observed in the pathological samples. The use of contrast agent improved the number of hearts that could be evaluated by both the M-mode and 2-D method (M-mode: non-contrast 87% vs contrast 99%, p<0.01; 2-D: non-contrast 26% vs contrast 89%, p<0.001). FAC from the 2-D method correlated better with the region of hypoperfusion in the pathological samples than did FS from the M-mode method (FAC: r=0.84 vs FS: r=0.51). In conclusion, FAC obtained from 2-D contrast echocardiography is useful for noninvasive assessment of global systolic function in infarcted murine hearts and can be used to serially assess systolic function in various models of the murine heart.","PeriodicalId":14544,"journal":{"name":"Japanese circulation journal","volume":"58 1","pages":"979-83"},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88499595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Amiodarone-Induced thyroid dysfunction and ventricular tachyarrhythmias during long-term therapy in Japan. 日本长期治疗期间胺碘酮引起的甲状腺功能障碍和室性心动过速。

Japanese circulation journal Pub Date : 2001-10-20 DOI: 10.1253/JCJ.65.958

T. Shiga, Michi Wakaumi, N. Matsuda, M. Shoda, N. Hagiwara, Kanji Sato, H. Kasanuki

引用次数: 24