Mitral velocity propagation
Mitral flow propagation velocity (Vp) has been proposed as an indicator of LV relaxation and correlates with invasive time constants of relaxation.44 Additionally, E/Vp ratio has been shown to correlate with LA pressure,45 but may not be accurate in patients with normal EF.40Further, transmitral E wave velocity is governed by the severity of mitral obstruction, making this measurement unreliable in the setting of MS.