I am dealing with this. I have a history of heart attacks and stints since I was 35. Been on two beta blockers, losartan and metoprolol since then. Now have Bradycardia and am constantly dizzy with headaches. My Cardiologist says it's just age, I'm 76, but my VA doctor thinks it's damage from heart attacks and stints weakening the heart muscle. I do to, but can't get anything in writing. Changing medicines isn't working .. need a different cardiologist but it's a rural town surrounded by rural towns.