First off, I will say I am under the care of my PCP and awaiting the results of an Echo. I am 31, male, not overweight , cholestoral is good, but blood pressure is borderline high, and family history of heart conditions. I will describe what I experience.... It only happens when I am doing something active like playing catch with my kids, playing football, or just anything active. I will have a little episode where my heart starts pounding super fast and my chest hurts, I get a little short of breath , and my eyes start to get black in my peripheral vison and it closes in like I will pass out.....I just kind of ignore it and walk it off with my arms above my head and take deep breaths until it goes away, which is usually only a minute or two at the most.......this has actually been going on for about 10 years and I just finally told my doctor and my wife. Like I said I am still waiting on the official word from my doc. Its been 1 week since my echo and no word......any thoughts? Adding some details in response to a few answers..... I dont smoke anymore, but I did for about 7 years. Quit 1.5 years ago. My Dr. already did an EKG and said its ok, not abnormal, but not entirely normal. whatever that means...she said something about my low being a little low. Or my pulse rate a little on the low side. But not major. I didnt know what to take of that. I am fine when I go up stairs, and I am fine after my first little attack when active. I can continue being active after I get over the first, sometimes second one. And, no Im not relying on your answers. Just wanted some thoughts. Sometimes you all bring up things I wouldnt have thought to ask to my dr. Thanks for all the responses, this is great. But I have to add something now......... So my doctors office called me back and the nurse that called said they just got my results faxed over and they looked normal. Granted, she was the only one that looked at them adn she thinks they are normal, but she will have the doc look at them and call me tomorrow.......thinking the nurse knows what shes talking about and everything is normal, should I still demand other tests? Surely what Im experiencing is something, but are other test going to find what an echo did not?