Maximum blood velocity during systole on Doppler ultrasound
Expansion
Peak Systolic Velocity
Purpose
Assesses flow and stenosis severity
Clinical Context
Peak systolic velocity increases with stenosis severity. Carotid duplex shows peak systolic velocity 125 to 230 centimetres per second and end diastolic velocity 40 to 100 centimetres per second suggesting 50 to 69 percent stenosis.
Related Terms
- EDV
- Doppler velocities
Key Points
- High peak systolic velocity suggests stenosis; carotid greater than 125 centimetres per second and greater than 50 percent stenosis, renal greater than 180 centimetres per second equals severe stenosis