Tachycardia: Brief episode of heart racing can come on with activation of your flight or freight mechanism ( sympathetic nervous system) it's ok to have this racing of ur heart provided is sporadic and back to normal when situation improves . Panic attacks can accompany heart racing too. If having difficulties during the day especially headaches and somnolence may want to check for sleep apnea. Good luck.
Answered 4/2/2014
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