AJP - Heart and Circulatory Physiology, Vol 243, Issue 5 738-H747, Copyright © 1982 by American Physiological Society
Relationship of coronary flow and perfusion territory in dogs
K. W. Scheel, L. A. Ingram and R. L. Gordey
In this study the relationship between myocardial flow and perfusion
territory at maximal vasodilation was examined for the left anterior
descending (A), circumflex (C), right (R), and septal (S) coronary
arteries. Average flows to A, C, R, and S were 31.2 +/- 1.5 (SE), 41.2 +/-
13.5 +/- 0.6, and 14.1 +/- 0.6% of total coronary flow. Strong correlations
were found between weight and volume, weight and coronary flow, and weight
and resistance of the perfusion territories of A, C, R, and S. However,
coronary flow (milliliter per minute per gram) to the right ventricle was
significantly lower than to the left ventricle. Examination of the
distribution of perfusion territories from base to apex of the heart showed
that the anterior descending territory increases from base to apex, whereas
the right decreases from base to apex. Circumflex flow distribution is
relatively uniform between these limits, and the septal artery is most
pronounced at midlevel and tapers toward the apex and base.
