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Ann Thorac Surg 1978;25:329-335
© 1978 The Society of Thoracic Surgeons

Articles

Evaluation of Regional Myocardial Nutrient Perfusion Following Selective Retrograde Arterialization of the Coronary Vein

Glen R. Rhodes, M.D.*, Donald C. Syracuse, M.D., Charles L. McIntosh, M.D., Ph.D.

Clinic of Surgery, National Heart, Lung, and Blood Institute, Bethesda, MD.

Accepted for publication July 6, 1977.

* Address reprint requests to Dr. Rhodes, Clinic of Surgery, National Heart, Lung, and Blood Institute, Bethesda, MD 20014

The effects of selective coronary vein occlusion (SCVO) and selective retrograde arterialization of the coronary vein (SRACV) on nutritional myocardial blood flow was evaluated in 10 dogs with radioactive microspheres. SRACV was performed with a shunt interposed between the aorta and the great cardiac vein (GCV). Following ligation of the GCV, measurements were performed before and after ligation of the middle portion of the left anterior descending coronary artery (LAD) and then after 15 and 30 minutes of SRACV. The myocardium was divided into three regions: circumflex coronary artery (served as control), high LAD (proximal to arterial occlusion; supplied by both SRACV and coronary flow), and low LAD (distal to arterial occlusion; supplied by SRACV alone).

SCVO decreased mean myocardial blood flow with increased distribution to the endocardium. SRACV to normally perfused myocardium did not significantly change myocardial blood flow; however, SRACV to acutely ischemic myocardium restored less than 50% of the decrease in myocardial blood flow. SRACV does not appear to greatly enhance blood flow to ischemic areas of the myocardium and may significantly reduce flow on the basis of venous occlusion alone.




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