chapter  118
Invasive Hemodynamics
Pages 14

CARDIAC OUTPUT Measurement of volumetric flow rate (i.e., stroke volume or cardiac output) is an important variable for evaluating systolic performance of the heart. Stroke volume is the amount of blood that the heart is able to eject during systole and occurs during the systolic ejection period from aortic valve opening to aortic valve closure. This ejection phase index depends on the loading conditions of the heart (afterload and preload) and on the intrinsic contractility of heart muscle. It provides an overall measurement of the ability of the heart to meet the metabolic demands of the body.