early to atrial ratio (E/A ratio)

Introduction

Ratio obtained from echocardiogram.

Normal left ventricular diastolic trans-mitral inflow pattern into the left ventricle, Early (E) vs Atrial (A) contractile phase, (E/A < 1.0).

With LV diastolic dysfuction, increased dependence of LV filling on atrial contraction. Atrial fibrillation obliterates atrial phase.

More general terms

• laboratory analysis

Additional terms

• left ventricular diastolic dysfunction; heart failure with preserved ejection fraction (HFpEF)