Doubt it. All I was told by my doc last time I went after being in intensive care was that I had an irregular second beat.
dude that stuffs serious dont blow that off like its nothing
7 months passed and I'm still alive. And how can you trust a doctor if they're paid everytime they attend a patient?
When I had to do this stuff in high school I just walked.
Try breathing with your nose only, like a boxer. It slows down your heartbeat and calms down your body, which works a little like a diazepam.
Fear makes you run faster
So does holding a knife.