Blood Flow in Coronary Vessels
The anatomical characteristics of the coronary circulation are summarized (Gregg and Fisher 1963; Berne and Rubio 1979; Marcus 1983) as follows: Two major coronary arteries (Fig. 6.1), a right and left, arise respectively from the right anterior and left anterior aortic sinuses of Valsalva. The left main coronary artery in adult humans is about 4–5 mm in diameter, and the mean length of this artery is 1.3 cm. The right coronary artery as its origin is about 3–4 mm in diameter. The left anterior descending coronary artery and its diagonal branches in humans perfuse most of the left ventricular myocardium. The septal perforating branches from the left anterior descending artery supply the interventricular septum. The left circumflex coronary artery follows the respective auriculoventricular groove to the left and terminates at a variable distance from the posterior longitudinal sulcus. In contrast to humans, the circumflex coronary artery in the dog supplies the largest area of cardiac muscle. The right coronary artery follows the respective auriculoventricular groove to the right. In man it usually (in about 80%) reaches the posterior sulcus and becomes the posterior descending artery.
KeywordsLeft Anterior Descend Blood Flow Velocity Coronary Flow Reserve Coronary Blood Flow Blood Velocity
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