CARDIAC CYCLE-PHASES

SUMMARY

1. Duration of the normal cardiac cycle at rest: 0.8-0.9 sec
2. A: closure of the MV at the onset of ventricular systole
3. B: closure of the AV at the onset of rapid ventricular ejection
4. C: closure of the AV at the end of ventricular ejection, forming the dicrotic notch
5. D: opening of the MV at the onset of ventricular diastole



Image: Dr. Appukutty Manickam.

Reference(s)

Barrett, K.E., Barman, S.M., Boitano, S., Brooks, H.L., Weitz, M., Brian Patrick Kearns, Ganong, W.F. and Mcgraw-Hill Education (Firm (2016). Ganong’s review of medical physiology. 25th ed. New York: Mcgraw Hill Education.
Hall, J.E. and Hall, M.E. (2020). Guyton And Hall Textbook Of Medical Physiology. 14th ed. S.L.: Elsevier - Health Science.
West, J.B. and Luks, A.M. (2021). West’s Pulmonary Pathophysiology. Lippincott Williams & Wilkins.