This is info only and remember I am not a Dr. and I do not officially intpret any test results.
The E/A ratio is the ratio between early (E) and late (atrial - A) ventricular filling velocity.
The early (E) diastolic one is caused by accumulation of blood in the atria during previous systole, and second, a late one created by atrial contraction (A).
In a young and compliant heart, early ventricular filling accounts for ~80% of ventricular end diastolic volume (with atrial systole pushing the last ~20% of blood into the ventricle). Thus, the 'E' component of the ratio is greater than the 'A' component. In an aging, less compliant heart, a greater proportion of this blood is pushed into the ventricles during atrial systole. In this scenario, the emphasis of ventricular filling during late diastole increases the 'A' component of the E/A ratio causing a reversal of the ratio.
The reversal of the E:A ratio is widely accepted as a clinical marker of diastolic heart failure. Reference: From Wikipedia.
Remember your Dr. used the world mild.
My husband has moderate cardiomyopathy with Systolic dysfunction. (Moderate Heart Failure) He is allowed to do the same things he has always done as far as activity. He takes one BP med and follows a low sodium diet.
Good luck and do keep us posted.
Remember HW does not take the place of a medical professional.