Complications of tachycardias vary in severity depending on such factors as the type of tachycardia, the rate and duration of a rapid heart rate, and the existence of other heart conditions. Possible complications include:

  • Blood clots that can cause a stroke or heart attack
  • Inability of the heart to pump enough blood (heart failure)
  • Frequent fainting spells
  • Sudden death, usually only associated with ventricular tachycardia or ventricular fibrillation
May. 25, 2011