心筋硬塞症の体表面心臓電位分布図の実験的研究 : 冠動脈前下行枝結紮例について

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Recently, it has become clear that the body surface isopotential maps (referred to below as map, for short) contain important diagnostic information which is not available in a conventional electrocardiogram or a vectorcardiogram. This report will investigate whether or not the diagnostic accuracy can be achieved from the maps in differentiating the location and extent of myocardial infarction Methods: Eleven mongrel dogs were anesthetized and the chest of each dog was opened by an incision at the left 5th intercostal space and myocardial infarction was caused by ligation of the orifice or branch of the left anterior descending coronary artery. In 1 to 5 weeks after the ligation, each heart was isolated to observe directly the location and extent of infarction. Each map was based on the record of unipolar lead electrocardiograms obtained through the use of needle electrodes attached to 85 lead points on each dog's chest surface in a supine position. Maps were made twice, before and a week after the ligation of each dog with a mapping system using a mini-computer. Results: The dogs with myocardial infarction were classified into three groups according to the location and extent of infarction. Each group had its own characteristic maps, as follows . Group I (Half of the ventricular septum and the larger part of the left anterior and left lateral wall were infarcted.) 1) The negative potentials always occupied the left anterior chest surface for the entire duration of the ventricular depolarization. 2) A large part of the dorsal region was occupied by the positive potentials from the early stage. 3) There was no appearance of the maximum on the left anterior chest surface. 4) The minimum was always observed near the center of the anterior chest surface all through the ventricular depolarization,
社団法人日本循環器学会の論文
1976-05-20

心筋硬塞症の体表面心臓電位分布図の実験的研究 : 冠動脈前下行枝結紮例について

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