Figure 1. Schematic illustrating the cardiac cycle.

Figure 1

Schematic illustrating the cardiac cycle. Illustrations at the top and middle represent the heart at end diastolic volume (EDV) and end systolic volume (ESV) emphasizing circumferential shortening of the ventricular chambers responsible for ejection. The scheme also emphasizes that a correlate of ventricular volume is length of the sarcomere, the functional unit, ultimately responsible for ejection. Stroke volume (SV) is EDV − ESV and cardiac output is computed from the relation: CO = HR × SV.

From: Introduction: Contractility and the Integrative Biology of the Myocardium

Cover of Regulation of Cardiac Contractility
Regulation of Cardiac Contractility.
Solaro RJ.
San Rafael (CA): Morgan & Claypool Life Sciences; 2011.
Copyright © 2011 by Morgan & Claypool Life Sciences.

NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.