ST segment changes under occlusion of the proximal portion of major coronary arteries in the isolated canine heart.
スポンサーリンク
概要
- 論文の詳細を見る
We studied the mechanisms of ST segment displacement in the ECG recorded from the epi- and subendocardium of ischemic ventricles in the isolated and perfused canine heart. ST segment changes were observed in association with a relatively large area of ischemia produced by occlusion of the left anterior descending and septal arteries (LAD+Sept.) or of the left circumflex artery (LCx).Contrary to previous reports, we found that the amount of subendocardial ST elevation was not always greater than that in the epicardial ECG recorded at the center of ischemia. Also, in the non-ischemic area, the degree of the ST depression in the subendocardial record was nearly the same as the epicardial record. On the other hand, the degree of the epicardial ST elevation on the border zone was always smaller than that at the ischemic center, which seemed to be due to the broadness of the border zone. The amplitude of the ST depression in the non-ischemic area was greater when the recording electrode was near the ischemic border, which supports the solid angle theory. The degrees of both ischemic ST elevation and reciprocal ST depression in the LCx perfused area were always greater than in the LAD+Sept. perfused area. These results strongly suggest that ST segment displacement depends on the relative position of the recording electrode to the electric double layer which exists at the border between the ischemic and non-ischemic area.
- International Heart Journal刊行会の論文
著者
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Koiwa Yoshiro
First department of Internal Medicine, Tohoku University School of Medicine
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Maruyama Yukio
First Department Of Internal Medicine Fukushima Medical College
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Koiwa Yoshiro
First Department Of Internal Medicine School Of Medicine Tohoku University
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Shimizu Yoshio
First Department of Internal Medicine
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Ashikawa Kouichi
First Dept. of Internal Medicine, Tohoku University school of Medicine
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Suzuki Hideyuki
First Department of Internal Medicine, Tohoku University School of Medicine, Sendai, Japan
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Takishima Tamotsu
First Department Of Internal Medicine Tohoku University School Of Medicine
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Isoyama Shogen
First Department Of Internal Medicine Tohoku University School Of Medicine
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Ishide Nobumasa
First Department Of Internal Medicine Tohoku University School Of Medicine
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Ino-oka Eiji
First Department Of Internal Medicine Tohoku University
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ISHIDE Nobumasa
First Department of Internal Medicine, Tohoku University School of Medicine
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KITAOKA Shigenori
First Department of Internal Medicine, Tohoku University School of Medicine
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NUNOKAWA Tooru
First Department of Internal Medicine, Tohoku University School of Medicine
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TAMAKI Kenji
First Department of Internal Medicine, Tohoku University School of Medicine
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SATO Shoichi
First Department of Internal Medicine, Tohoku University School of Medicine
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MARUYAMA Yukio
First Department of Internal Medicine, Tohoku University School of Medicine
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ASHIKAWA Kouichi
First Department of Internal Medicine, Tohoku University School of Medicine
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