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ID 16220
Eprint ID
16220
FullText URL
Thumnail 96_87.pdf 1.28 MB
Title Alternative
Effect of coronary sinus occlusion on coronary circulation and hemodynamics Part 1. Effect of coronary sinus occlusion on coronaryhemodynamics and incidence of ventricular fibrillationduring acute myocardial ischemia in dogs
Author
Nishiyama, Osamu
Abstract
The effect of coronary sinus (CS) occlusion produced with a specially designed balloon catheter on coronary hemodynamics and ischemia-induced ventricular fibrillation was studied in anesthetized open-chest dogs. Heart rate (HR), aortic blood pressure (BP), left ventricular max dp/dt, coronary blood flow (CBF) and cardiac output decreased slightly with coronary sinus occlusion, while left ventricular end-diastolic pressure was not affected. These changes were attenuated but did not disappear, by pre-treatment with atropine. This result suggests that, at least partly, these changes were direct effects of venous congestion in the ventricular wall. CBF decreased in the diastolic, but increased in the systolic phase. Coronary sinus pressure (CSP) markedly increased especially in systole after CS occlusion, resulting in a pressure pattern resembling the left ventricular pressure pattern. The CSP exceeded the left ventricular pressure in the diastolic phase. Peak flow, reactive hyperemia flow, and repayment after a brief coronary artery occlusion were all decreased. Myocardial O(2) extraction increased by about 9%, and the increase correlated well with the elevation of mean CSP. When the left anterior descending coronary artery was occluded, CS-occlusion increased retrograde pressure from 22±4mmHg to 33±7mmHg, and the incidence of ventricular fibrillation was decreased. Washout of the metabolites by retrograde flow from the ischemic myocardium would seem to be responsible for this reduction of ventricular fibrillation.
Keywords
冠静脈洞閉鎖
反応性充血
逆行性血圧
心室細動
心筋酸素摂取率
Published Date
1984-02-28
Publication Title
岡山医学会雑誌
Publication Title Alternative
Journal of Okayama Medical Association
Volume
volume96
Issue
issue1-2
Publisher
岡山医学会
Publisher Alternative
Okayama Medical Association
Start Page
87
End Page
99
ISSN
0030-1558
NCID
AN00032489
Content Type
Journal Article
Official Url
https://www.jstage.jst.go.jp/article/joma1947/96/1-2/96_1-2_87/_article/-char/ja/
Related Url
http://www.okayama-u.ac.jp/user/oma/index.html
language
日本語
Copyright Holders
岡山医学会
File Version
publisher
Refereed
True
Eprints Journal Name
joma