1. 3. E. Braunwald, Heart Disease: A Textbook of Cardiovascular Medicine , Third Edition . Philadelphia, W.B. Saunders Company, 1988 , Chapter13 .
2. 4. SW. Hurst, The Heart , fifth edition . New York, McGraw-Hill Book Company, 1982 , pp.7 -141 .
3. 5. RM. Berne, Handbook of Physiology, Section 2 . Bethesda, Maryland, American Physiological Society, 1979 , pp.873 -952 .