peak systolic velocity
Also written as: PSV — Peak Systolic Velocity
Maximum blood flow velocity measured during cardiac systole, used to assess arterial stenosis severity in Doppler ultrasound studies.
Full Definition
Peak systolic velocity (PSV) represents the maximum blood flow velocity measured during the systolic phase of the cardiac cycle using Doppler ultrasound. This parameter is fundamental in assessing arterial stenosis severity, as increased velocities typically indicate narrowed vessel lumens. PSV measurements are angle-dependent and require proper Doppler angle correction for accuracy. Established velocity thresholds help categorize stenosis severity and guide clinical decision-making in vascular disease management.
Usage
Usage note: Always report the Doppler angle used when documenting PSV measurements.
In Context
- "The peak systolic velocity exceeded 230 cm/s, indicating severe carotid stenosis." — Duplex ultrasound report
- "Peak systolic velocity measurements were obtained at optimal Doppler angles to ensure accuracy." — Technical imaging note