I have mitral valve regurgitation. Tonight i was outside and i got a little adrenaline rush and all of a sudden my heart started pounding like it was going to bust out of my chest. Then everything started to go black and my legs started to give out. I stumbled to try to get back to the house and finally got to where i could stand straight up. While walking to the house i couldnt walk straight and i felt extremely dizzy and lightheaded with a slight feeling i was going to vomit. After about a minute or so everything went back to normal. I have mitral valve and didnt know if this had anything to do with it. I have no clue what is going on.

Just a little background...i ran a marathon on sunday, if that could have anything to do with it.

Some of your symptoms are of course associated with MVR (fainting, autonomic system malfunction). You need to get an echocardiogram if you haven't had one it the last 3-6 months. Was you diagnosed with trace or mild regurgitation? Surely you would not have ran a marathon with even mild MVR......Did you run this by your doctor prior to the marathon?

I have mitral valve regurgitation. Tonight i was outside and i got a little adrenaline rush and all of a sudden my heart started pounding like it was going to bust out of my chest. Then everything started to go black and my legs started to give out. I stumbled to try to get back to the house and finally got to where i could stand straight up. While walking to the house i couldnt walk straight and i felt extremely dizzy and lightheaded with a slight feeling i was going to vomit. After about a minute or so everything went back to normal. I have mitral valve and didnt know if this had anything to do with it. I have no clue what is going on.

Just a little background...i ran a marathon on sunday, if that could have anything to do with it.

I had/have moderate to severe MVR. There is no pain, dizziness, etc. with MVR, but there may be symptoms associated with a decrease in cardiac output (blood returns to upper chamber and lost to system). With a decrease in cardiac output secondary to MVR, one will/can experience shortness of breath, muscle fatigue, and angina, etc. especially true with a very heavy demand for bloods oxygen running a marathon. General condition and training aside.