Heart is a muscle but it is a smooth muscle
and not the skeleton one to perform any exercise. since you have tricuspid leak you will need the surgery sooner or later. but such type of condition progresses v slowly so do not hurry but follow your cardiologist's advise. till then best natural exercise is walking atleast 2 km a day., avoiding any fatty food,must stop any smoking/drinking etc. any excessive work may lead you to short of breath so avoid that. keep taking medicines very regularly. there is gradual cardiomegaly
so plz do as your doc advises.
I hope I answered your query. Wish you good health.