question: Ive recently been released from the hospital for chest pains and shortness of breath.I have a history of high blood pressure in part due to a poor diet and some heart damage i sustained when i had AML leukemia.   I have an enlarged heart and was told that the left side of my heart is functioning at 45%.  My question is it possible at all with proper diet and exercise / weight loss to reverse the symptoms of breathlessness. Also would this be considered congestive heart failure or a precursor.  I am 24 years old and 5ft 8 inches tall at a weight of 220lbs with the goal of losing 40 lbs.