Supraventricular Tachycardia
"Heart ramped up to 200 bpm. Received two doses of adenosine in ambulance as first dose didn&#039;t work.  EMT&#039;s warned me it would cause some pretty unpleasant feelings.  Intense burning and pressure occurred instantaneously, from my head to my toes.  It was pretty horrific, but short lived.  I even manged to joke how excited I was to receive a second dose and experience it again. Heart rate was in upper 90&#039;s by time I was settled in emergency room at the hospital."