CARDIAC ELECTRICAL ACTIVITY-SYNCHRONIZATION

SUMMARY

1. RA systole precedes LA systole.

2. LV contracts before RV.

3. RV ejection begins before LV ejection (since PA pressure is lower than aortic pressure).

4. During inspiration, the aortic valve closes slight before pulmonic valve.

5. During expiration, the pulmonary & aortic valves close at the same time.

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.