don't worry that much !!! the diastolic heart failure involves the left chamber of your heart, mostly due to a thickness of the wall after a long undiagnosed hypertension. the main factor for the prognose is the EF, that means ejection fraction of the left chamber. and of course the hypertension should be treated. If the left atrium is enlarged ( because of the diastolic failure, more blood in the atrium) the mitral valve can become insufficient. even then there is a solution ,as the cardiologist will put a mitral clip around the valve (no operation, katheter)
yoanne