The definition of stroke volume is the volume of blood pumped out of the heart's left ventricle during each systolic cardiac contraction. The average stroke volume of a 70 kg male is 70 mL. Not all the blood that fills the heart by the end of diastole (end-diastolic volume - EDV) can be ejected from the heart during systole. Learn how stroke volume (SV) is defined and regulated by preload, afterload and inotropy. SV is the difference between ventricular end-diastolic volume (EDV) and end-systolic volume (ESV), and it affects cardiac output and blood pressure. Understanding how to calculate stroke volume is essential for assessing cardiovascular health, diagnosing diseases, and optimizing athletic performance. This guide dives deep into the mechanics of stroke volume, its relationship with cardiac output, the principles of Starling’s law, and their clinical applications. We’ll integrate real-world data, actionable insights, and structured explanations to ensure clarity and authority. Introduction: Stroke volume is a critical parameter in cardiovascular physiology that determines the amount of blood ejected by the heart with each contraction. This comprehensive article aims to explore the physiology of stroke volume, including the factors influencing its regulation and its significance in cardiac output.
