In cardiovascular physiology, stroke volume (SV) is the volume of blood pumped from one ventricle of the heart with each beat. SV is calculated using measurements of ventricle volumes from an echocardiogram and subtracting the volume of the blood in the ventricle at the end of a beat (called end-systolic volume) from the volume of blood just prior to the beat (called end-diastolic volume). The term stroke volume can apply to each of the two ventricles of the heart, although it usually refers to the left ventricle. The stroke volumes for each ventricle are generally equal, both being approximately 70 ml in a healthy 70-kg man.
Stroke volume is an important determinant of cardiac output, which is the product of stroke volume and heart rate, and is also used to calculate ejection fraction, which is stroke volume divided by end-diastolic volume. Because stroke volume decreases in certain conditions and disease states, stroke volume itself correlates with cardiac function.
Other articles related to "stroke volume, volume":
... Frank–Starling mechanism or Maestrini heart's law) states that the stroke volume of the heart increases in response to an increase in the volume of blood filling the heart (the end diastolic volume) when all other ... The increased volume of blood stretches the ventricular wall, causing cardiac muscle to contract more forcefully (the so-called Frank-Starling mechanisms) ... The stroke volume may also increase as a result of greater contractility of the cardiac muscle during exercise, independent of the end-diastolic volume ...
... for more details Cardiac output (= heart rate * stroke volume ... Can also be calculated with Fick principle.) Stroke volume (= end-diastolic volume - end-systolic volume) Ejection fraction (= stroke volume / end-diastolic volume) ((Car ...
... Similar to cardiac index, is a method of relating the stroke volume to the size of the person ...
... or papillary muscle) causes a sudden volume overload of both the left atrium and the left ventricle ... The left ventricle develops volume overload because with every contraction it now has to pump out not only the volume of blood that goes into the aorta (the forward cardiac output or forward stroke volume ... The combination of the forward stroke volume and the regurgitant volume is known as the total stroke volume of the left ventricle ...
... versus time curve for one cardiac cycle is the stroke volume ... heart rate, and thereby Q can be calculated as the product of stroke volume and heart rate ... heart beats, but it is also possible to quantify the stroke volume in real time on a beat-for-beat basis ...
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