The ea in cardiac ultrasound refers to the ratio of the E peak to the A peak. The E peak is the filling peak of the left ventricle that fills quickly in early diastole; and the A peak is the filling peak that fills in late diastole. The E and A peaks in the cardiac ultrasound are usually used to assess the diastolic function of the ventricle, the E peak represents the maximum velocity of the mitral valve in early diastole, and the A peak represents the maximum velocity of the atrium in systole, with a normal value of E/A>1. If the cardiac ultrasound E/A is less than 1, it indicates that the ventricle has a reduced diastolic function, which is often found in hypertension, coronary artery disease, diabetes mellitus, and hypertrophic cardiomyopathy, etc. However, if we only look at this result, it is not enough to assess the diastolic function of the ventricle. However, if you only look at this result, then the clinical significance of the cardiac ultrasound ea ratio is not great, but also the number of heartbeats per minute, combined with the total atrial area, mitral annulus systolic position changes, pulmonary venous spectrum, E/E ‘and other indicators of a comprehensive assessment.