The difference between DD and DF if I remember right is pulmonary congestion fluid or blood back up in to the lungs and other organs.
Diastolic Dysfunction means there is some stiffness in the heart that that prevents it from filling with blood properly. Beta Blockers help the heart relax so it can fill with blood better and lower your BP.
Diastolic dysfunction is different from diastolic heart failure. It only means that measurements made by Doppler during your echocardiogram exam showed evidence SUGGESTIVE of diastolic dysfunction (as stated in your report). These measurements need to be interpreted in the context of how you feel. If you have symptoms of heart failure such as shortness of breath, inability to lie flat at night, swellings in your legs, then you might have diastolic heart failure. To answer your question, it is possible to have diastolic dysfunction without heart failure. However, the fact that your pulmonary artery pressure is mildly elevated does suggest that you might have diastolic heart failure. As you know, this condition is common in patients with high blood pressure and the treatment is a drug to lower your blood pressure, such as a beta-blocker.
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