Hello, I have a friend who has a heart problem. He will just start breathing real heavy for no reason, and his heart will just start beating faster. He cannot suck in enough air it seems. He has been to a doctor, and had medical tests, including a sonagram of his heart, ekg and even a ct scan and a treadmill test. Everything came out fine, and the flow volumes and the like show his heart is using oxygen just fine etc. Everything came back on all the tests as ok. Except he still has the problem. Has anyone ever heard of such a condition? I was wondering what the medical name for it is. What kinds of medications are commonly given for such things? beta blockers? Any insight would be greatly appreciated. Thank you.