<s>[INST] 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. [/INST] Hi, There are some medications, such as beta blockers, ACE inhibitors, etc., that any patient with low ejection fraction and breathlessness should take. If you were in hospital, then most probably your physician has already prescribed you appropriate treatment. In your age if you take your medication regularly, lose weight and have healthy lifestyle, there are chances that your heart contractility will improve. So, go ahead and do your best with healthy lifestyle. Take care </s>