Pulsed wave Doppler signals from the RV outflow tract. Panel A demonstrates a non-notched flow velocity envelope. Panel B is more triangular with a late-systolic notching pattern. Panel C has a pronounced mid-systolic notching pattern. The difference in the shape of the Doppler patterns is largely determined by differences in pulmonary vascular resistance, not PA pressure.
Additional keywords: doppler,hemodynamics,outflow tract