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pressure-volume loop
A graphical representation of the relationship between left ventricular pressure and volume throughout the cardiac cycle.
Full Definition
The pressure-volume loop is a fundamental concept in cardiovascular physiology that illustrates left ventricular function throughout systole and diastole. The loop demonstrates preload, afterload, contractility, and compliance in a single diagram. In cardiovascular anesthesiology, understanding pressure-volume relationships helps guide therapeutic interventions and assess the effects of anesthetic agents on cardiac function. Changes in loop shape and position indicate alterations in ventricular performance and loading conditions.
Usage
Usage note: Hyphenate when used as a compound modifier.
In Context
- "The pressure-volume loop analysis revealed decreased contractility following cardioplegic arrest." — Hemodynamic assessment report
- "Preload optimization was guided by pressure-volume loop monitoring." — Intraoperative management note
Also known as
PV loop
ventricular function curve
Don't confuse with
Frank-Starling curve
venous return curve