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Internal cardioversion. Internal cardioversion for atrial fibrillation is used in patients who are resistant to external cardioversion or inadvertently induced during an electrophysiologic study. Cardioversion should occur before placement of an atrial defibrillator.
Cardioversion can be used to treat many types of fast or irregular heart rhythms. The most common irregular heart rhythms that require cardioversion include atrial fibrillation and atrial flutter. Life-saving cardioversion may be used to treat ventricular tachycardia (a rapid, life-threatening rhythm originating from the lower chambers of the heart). Why is the cardioversion procedure needed? Your doctor may recommended that you have a cardioversion procedure to restore your heart rate and rhythm to normal, so you heart can pump as it should. Sometimes, irregular heart rhythms can cause symptoms including: