[Study of the myocardial circulation after experimental ligation of the coronary vessels and revascularization operations].

Abstract

An isotope method using P 32 was employed for evaluation of the myocardial capillary circulation in dogs. Subsequent to one hour isolated coronary perfusion, radioactivity was measured in myocardial tissue obtained from various areas of the heart supplied by different branches of the coronary tree (number of impulses/10 g wet tissue/min.). These experiments were carried out with unimpaired coronary arteries and after acute and chronic ligature of the descending branch of the left coronary artery, as well as in revascularized hearts. The results support the validity of the revascularizing con­