I was recently was admitted to the hospital with high heart rate , headache , feeling like I was going to pass out. Feeling like somthing heavy was on my chest & shaking. this is the 3rf tim e in the past year this has happend, EKGs, Stress test, angiogram, chest xray & blood work all have been done. no one cal tell me what is going on. I am going to do follow up with cardio dr this week. What can I expect from the vist or what should I ask?