Septal Tissue Doppler S' Unit Converter

Septal tissue Doppler S' (s-prime) is a measurement taken during an echocardiogram that captures the peak velocity of the septal (medial) mitral annulus as it moves toward the apex of the heart during systole (contraction). It is reported in centimeters per second (cm/s).

This velocity reflects how well the left ventricle contracts along its long axis. Because the heart muscle shortens longitudinally during each beat, measuring the speed of that motion at the septum provides a window into overall systolic function.

A normal septal S' is generally considered to be 7 cm/s or higher in adults. Values below this threshold may indicate reduced systolic performance, even when the ejection fraction appears normal.

The S' velocity originates from the longitudinal contraction of the left ventricular myocardium, specifically the interventricular septum. It is measured at the medial (septal) mitral annulus using tissue Doppler imaging during an echocardiogram.