Mitral E-Wave Unit Converter

The mitral E-wave is a measurement obtained during an echocardiogram that represents the peak velocity of blood flowing from the left atrium into the left ventricle during early diastole (the relaxation phase of the heartbeat).

This early filling phase accounts for roughly 70–85% of the blood that enters the ventricle each heartbeat. The "E" stands for "early," distinguishing it from the A-wave, which represents the later phase of filling driven by atrial contraction.

The E-wave velocity reflects two main factors: the pressure difference between the left atrium and left ventricle, and how well the ventricle relaxes and stretches during filling. It is commonly interpreted alongside the A-wave (as the E/A ratio) and tissue Doppler e' velocity (as the E/e' ratio) to assess diastolic function.

The mitral E-wave is not a substance produced by the body. It is an echocardiographic measurement of blood flow velocity across the mitral valve during early ventricular filling, generated by the pressure gradient that develops between the left atrium and the relaxing left ventricle.