Sunday, October 16, 2011

Blood Flow Mechanism in the Myocardium

Blood flow through the coronary arteries is influenced by myocardial compression in systole and pulsatile variations. The blood supply to the myocardium is diminished during the ventricular systole and increased during the ventricular diastole. During systole the coronary veins are compressed. A falling oxygen tension in heart muscle plays a decisive role as a chemical factor in adaptation of the blood flow to an increased workload of the heart.