What is the term for the amount of blood ejected from the left ventricle during each heartbeat?

The term for the amount of blood ejected from the left ventricle during each heartbeat is stroke volume. Stroke volume is a key component of the cardiovascular system and reflects the volume of blood pumped by the left ventricle with each contraction. It is an important measure because it contributes to cardiac output, which is the total volume of blood the heart pumps in a minute. Stroke volume can be influenced by factors such as contractility of the heart, preload (the degree of stretch of the heart muscle before contraction), and afterload (the pressure against which the heart must work to eject blood).

In contrast, cardiac output represents the total amount of blood pumped by the heart per minute, calculated as stroke volume multiplied by heart rate. End diastolic volume refers to the volume of blood in the ventricles at the end of filling (diastole) before contraction, which is not the same as the volume ejected during contraction. Blood pressure is a measure of the force exerted by circulating blood on the walls of blood vessels, but it does not specifically indicate the volume of blood ejected per heartbeat. Understanding stroke volume is crucial for assessing cardiac function and overall cardiovascular health.