Get a second opinion. Not that the treatment offered will be much different. The docs all want to treat me as a patient with heart disease and other diseases. I, like you, have no heart disease or co-morbidities. No high blood pressure, no diabeties, not over weight, control sodium to under 1500mg daily by diet, exercise 5-6 days, 180-200 minutes weekly. My heart failure is diagnosed as idiopathic cardiomyopathy with LBBB causing erratic PVCs that often exceed 10%-35% of my beats in any given minute. This means my heart failure has no known cause. Two cardilogists told me, one from the Mayo, that is is likely caused by a unknown virsus. Covid??. I looked it up people like us represent .28% of women in this country diagonosed with heart failure. The docs are treating us with medicines developed for the 99.72% of the HF women patients. I keep advocating for the least treatments that won't jeapardize my excellent health with drugs that are not proven to help my condition.