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Evaluating the Role of Right Ventricular Free Wall Longitudinal Strain as a Noninvasive Metric for Stroke Volume,

Samwel Gitundu1, Luis F Gonzalez-Ciccarelli2, Brian R Gebhardt3

  • 1Department of Anesthesiology and Perioperative Medicine, Tufts Medical Center, Boston, MA.

Journal of Cardiothoracic and Vascular Anesthesia
|March 30, 2025
PubMed
Abstract

No abstract available in PubMed .

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Regulation of Stroke Volume01:27

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The regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
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Cardiac output (CO), the amount of blood the heart pumps per minute, is a parameter in cardiovascular physiology determined by stroke volume and heart rate. Stroke volume, the amount of blood pushed from one of the ventricles per heartbeat, is influenced by preload, afterload, and contractility.
Preload
Preload refers to the initial elongation of the cardiac myocytes before contraction and is related to the volume of blood filling the heart at the end of diastole, or end-diastolic volume. The...
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