ANGIOGRAPHIC DEMONSTRATION OF IMPORTANT ANATOMIC VARIATIONS OF THE POSTERIOR DESCENDING CORONARY ARTERY

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Abstract
One of the most important branches of the right coronary artery in most patients is the posterior descending artery, which supplies blood to the posterior diaphragmatic portion of the interventricular septum. Significant anatomic variations were found in the origin, course or distribution of this vessel in 23 per cent of a series of 200 patients. These included double posterior descending branches, early origin of the posterior descending artery and partial supply of the diaphragmatic portion of the septum by acute marginal or posterior right ventricular branches. These variations are described and illustrated angiographically. Their importance in proper interpretation of coronary arteriograms and planning of bypass procedures is stressed.

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