Septal Tissue Doppler e' Unit Converter

Septal tissue Doppler e' (also written as e' or E') is an echocardiographic measurement of how quickly the heart muscle relaxes during early filling. It is recorded at the septal (medial) side of the mitral annulus using a technique called pulsed-wave tissue Doppler imaging.

A normal septal e' is generally 7 cm/s or higher, though values vary with age. Septal e' is typically slightly lower than lateral e' due to the septum's attachment to the right ventricle.

Together with the mitral inflow E wave, septal e' is used to calculate the E/e' ratio, a key indicator of left ventricular filling pressure. A septal E/e' below 8 suggests normal filling pressure, while a ratio above 15 suggests elevated pressure.

Septal e' is measured at the medial mitral annulus in the apical four-chamber echocardiographic view. It reflects the longitudinal relaxation velocity of the interventricular septum, which separates the left and right ventricles.