Tricuspid Regurgitation Velocity (TRV) Unit Converter

Tricuspid regurgitation velocity (TRV) is the peak speed of blood flowing backward through the tricuspid valve, measured by Doppler echocardiography. The tricuspid valve sits between the right atrium and right ventricle of the heart, and a small amount of backflow (regurgitation) during each heartbeat is normal.

TRV is used as a noninvasive estimate of pulmonary artery systolic pressure (PASP). Using the modified Bernoulli equation, the velocity is converted into a pressure gradient between the right ventricle and right atrium. In healthy adults, TRV at rest is typically around 2.0 m/s, with an upper limit of approximately 2.5 m/s.

A TRV above 2.8 m/s is considered suggestive of pulmonary hypertension and typically warrants further evaluation.

TRV is generated by the backward flow of blood from the right ventricle into the right atrium during systole (when the heart contracts). The velocity depends on the pressure difference between these two chambers, which is driven by pulmonary artery pressure and right ventricular function.