question: Hi, I am a man 45yo, had hart infarct last year + angioplasty (3 stents), left ventricol got some damage as I arrived very late to the hospital.After one year the echo shows a FE of 47%, they say  won`t get far than that probably, due to the delay of the surgery, got no symptoms, sporting aerobics 40min. a day ,feeling good, only during the sleep I wake up sometime feeling high heartrate, say round 80<>100, during daytime is always 70/75, my drug therapy is