Heart Model
Cardiovascular Physiology Concepts Richard E. Klabunde, PhD

Cardiovascular Physiology Concepts 3e textbook cover Cardiovascular Physiology Concepts, 3rd edition textbook, Published by Wolters Kluwer (2021)

CNormal and Abnormal Blood Pressure, Physiology, Pathophysiology and Treatment book cover Normal and Abnormal Blood Pressure, published by Richard E. Klabunde (2013)

Cardiac Cycle - Reduced Filling (Phase 7)

A-V Valves Open

cardiac anatomy - reduced fillingCardiac cycleAs the ventricles continue to fill with blood and expand, they become less compliant and the intraventricular pressures rise. The increase in intraventricular pressure reduces the pressure gradient across the AV valves so that the rate of filling falls late in diastole (this is sometimes referred to as diastasis). 

In normal, resting hearts, the ventricle is about 90% filled by the end of this phase. About 90% of ventricular filling occurs passively before atrial contraction (Phase 1). Aortic and pulmonary arterial pressures continue to fall during this period.


Jump to other phases:

Revised 11/04/2023

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