Endocardial Excitation and Conduction During Reperfusion Arrhythmias : SYMPOSIUM ON VENTRICULAR ARRHYTHMIA : BASIC AND CLINICAL STUDIES : 50th Annual Scientific Session of the Japanese Circulation Society
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概要
- 論文の詳細を見る
In order to clarify the role of Purkinje fibers in the occurrence of reperfusion arrhythmias, endocardial mapping was performed on perfused canine hearts by attaching 42 close bipolar electrodes to the endocardial surface of the left ventricular septum. Reperfusion with oxygenated Krebs-Ringer solution following 30 min of coronary occulusion induced ventricular tachycardia (VT) in 14 out of 23 preparations. These VT degenerated into ventricular fibrillation (VF) within 1 min after the reperfusion in all but 3 cases. Endocardial mapping revealed that the excitations during VT were always initiated by the Purkinje activities and that myocardial excitations were expanded in a centrifugal manner through Purkinje-muscle junctional area. Furthermore, this excitation pattern was preserved, in the early phase of VT, even though the propagation pattern was distorted. VF was always induced by reperfusion following 30 min of ischemic condition, that is, coronary perfusion with a hyperkalemic (K=10 mM), acidic (pH=6.8) and hypoxic (PO_2=20-40 mmHg) solution (4/4 cases). Elimination of hyperkalemia from the ischemic condition markedly prevented occurrence of VF (1/6 cases) during reperfusion but it did not affect occurrence of VT (4/6 cases); this implies that hyperkalemia causes the onset of VF but has less effect on the occurrence of VT. It has been separately confirmed by micro-electrode experiment, using the dissected papillary muscle of the canine right ventricle, that abnormal impulse formation during re-oxygenation was triggered in Purkinje fibers around Purkinje-muscle junction.
- 社団法人日本循環器学会の論文
- 1987-02-20
著者
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Kodama Itsuo
Department of Cardiovascular Research, Research Institute of Environmental Medicine, Nagoya Universi
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HONJO Haruo
Department of Humoral Regulation Division of Regulation of Organ Function Research Institute of Envi
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Hirai Makoto
Department Of Circulation And Respiration Research Institute Of Environmental Medicine Nagoya Univer
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YAMADA Kazuo
Department of Biochemistry, Faculty of Medicine, Shimane University
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Honjo Haruo
Department Of Cardiovascular Research Research Institute Of Environmental Medicine Nagoya University
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Toyama J
Aichi Prefecture Hospital
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Toyama Junji
名古屋大学 大学院医学系研究科循環器内科
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Toyama Junji
Department Of Circulation And Respiration The Research Institute Of Environmental Medicine Nagoya Un
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Yamashita Kentaro
Cardiovascular Center Nagoya Daini Red Cross Hospital
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Osaka Toshiyuki
Department of Arrhythmia and Electrophysiology, Shizuoka Saiseikai General Hospital
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ANNO TAKAFUMI
Department of Circulation and Respiration, Research Institute of Environmental Medicine, Nagoya Univ
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OHTA TOSHIKI
Department of Circulation and Respiration, Research Institute of Environmental Medicine, Nagoya Univ
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Ohta Toshiki
Department Of Circulation And Respiration Research Institute Of Environmental Medicine Nagoya Univer
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Honjo Haruo
Department Of Applied Physics Faculty Of Engineering
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ANNO Takafumi
Health Promotion Unit, Aichi Prefectural Center of Health Care
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Toyama Junji
Department Of Circulation Division Of Regulation Of Organ Function Research Institute Of Environment
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Anno Takafumi
Departments Of Circulation And Humoral Regulation Research Institute Of Environmental Medicine Nagoy
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Anno Takafumi
Aichi Prefectural Center Of Health Care
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Anno Takafumi
Health Promotion Unit Aichi Prefectural Center Of Health Care
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Kodama Itsuo
Department Of Cardiovascular Research R.i.e.m. Nagoya University
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Toyama Junji
Department Of Cardiology Toyohashi Heart Center
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Toyama Junji
Department Of Cardiology Aichi Prefectural Owari Hospital Cardiovascular Center
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Yamada Kazuo
Department Of Biochemistry Faculty Of Medicine Shimane University
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Yamada Kazuo
Department Of Architecture Faculty Of Engineering Aichi Institute Of Technoligy
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Hirai Makoto
Department of Cardiology, Nagoya University Graduate School of Health Science
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Yamada Kazuo
Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University
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