Lea Ann .
Cardiac ECHO measurements
Diastolic Dysfunction is diagnosed based on Doppler ECHO - Blood flow across the mitral valve occurs in 2 phases: an early transmitral flow (E wave) and a late flow with atrial contraction (A wave). The relative contribution of each is expressed as a ratio (E/A). An E/A ratio less than 0.75 or greater than 1.5 indicates DD.