Intracoronary endothelin-1 increases coronary retrograde pressure by constricting arterioles

Keiichi Fukuda, Shingo Hori, Masatoshi Kusuhara, Toru Satoh, Shingo Kyotani, Soushin Inoue, Hideto Ohno, Ken Yamaguchi, Shunnosuke Handa, Yoshiro Nakamura

研究成果: Review article査読

6 被引用数 (Scopus)


Study objective - The aim was to determine the site of coronary vasoconstriction induced by endothelin, by investigating the response in terms of retrograde pressure and reactive hyperaemia.Experimental material - Twelve anaesthetised mongrel dogs, 12-14 kg, were used for the studies.Design - The left anterior descending coronary artery was cannulated and perfused with blood through an extracorporeal bypass. The effects of intracoronary endothelin-l (1-500 pmol) on coronary blood flow, coronary flow reserve (the peak reactive flow and the repayment after 15 s coronary occlusion), and retrograde coronary pressure during coronary occlusion were studied (n=7). The retrograde coronary flow was collected from the bypass at each dose (n=5).Measurements and main results - At doses of greater than 20 pmol the coronary flow decreased dose dependently and reached almost zero flow at 500 pmol. The coronary flow reserve also decreased; however, the retrograde pressure was raised dose dependently at doses of greater than 10 pmol. At a dose of 500 pmol, the retrograde pressure was increased to 61 mm Hg [82(SEM 12)% of the coronary perfusion pressure]. Retrograde flow remained unchanged throughout the experiment.Conclusions - The endothelin-1 induced rise in retrograde pressure is in accordance with a dose dependent reduction in coronary flow reserve, and collateral flow was not augmented by endothelin. It is concluded that the effect of endothelin-1 on coronary circulation in situ was mainly due to the constriction of small resistant vessels.

ジャーナルCardiovascular Research
出版ステータスPublished - 1990 12月

ASJC Scopus subject areas

  • 医学一般


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