peak systolic velocity
Also written as: PSV — Peak Systolic Velocity
The maximum blood flow velocity measured during the systolic phase of the cardiac cycle.
Full Definition
Peak systolic velocity (PSV) represents the highest velocity of blood flow measured during ventricular systole, typically assessed using Doppler ultrasound. This measurement is fundamental in vascular imaging for quantifying the degree of stenosis and assessing hemodynamic significance of vascular lesions. PSV values are used to grade stenosis severity according to established criteria, with specific thresholds varying by vessel location. In editorial work, proper abbreviation usage and accurate numerical reporting of PSV values are essential for clinical interpretation.
Usage
Usage note: Always specify units (cm/s) and include vessel location.
In Context
- "Peak systolic velocity in the right internal carotid artery measured 250 cm/s, indicating severe stenosis." — Doppler ultrasound report
- "The PSV ratio between stenotic and pre-stenotic segments was calculated at 3.2." — Vascular laboratory report