###Human: Does high E/A ratio suggest diastolic dysfunction? ###Assistant: Hello. In order to diagnose a person to have diastolic dysfunction, there are factors that have to be met. Like ejection fraction more than 45%, the presence of diastolic stiffness, and heart failure symptoms, with changes in some laboratory test indexes. E/A ratio greater than 1.5, is not a criterion for diastolic dysfunction, it is not a gold standard. E/A ratio up to 2.33 is considered normal for people below 23 years. For more information consult a cardiologist online -->