What is the Origin of Stroke Volume?

This term is central to cardiovascular physiology and clinical cardiology, stemming from the early quantification of heart function. The concept is based on the mechanical action of the heart as a pump, where the volume of blood pushed out is a direct measure of ventricular efficiency. It is a crucial parameter used to assess the functional capacity of the heart muscle.

What is the Mechanism of Stroke Volume?

Stroke volume is determined by three primary factors: preload, afterload, and contractility. Preload is the degree of ventricular stretch before contraction, afterload is the resistance the heart must overcome to eject blood, and contractility is the intrinsic strength of the heart muscle. Hormones, particularly thyroid hormones and catecholamines, modulate contractility and heart rate, thereby influencing the overall efficiency of the stroke volume.

Stroke Volume

Meaning

Stroke volume is a fundamental physiological metric defined as the volume of blood ejected by the left ventricle of the heart with each single contraction or beat. This measurement is a key determinant of cardiac output, which represents the total volume of blood pumped per minute. A robust stroke volume is a primary indicator of cardiovascular fitness and efficient circulatory function.

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∞ Visceral Adipose Tissue
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Stroke Volume

Meaning

Origin

Mechanism

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