Cardioversion

Cardioversion is the delivery of an electric shock to the chest through electrodes or paddles. The shock is given to correct a dangerous heart rhythm. Cardioversion can be done as an elective (scheduled) procedure or may be done urgently if an abnormal heartbeat is immediately life-threatening.

  • Call Your Doctor

    After you leave the hospital, contact your doctor if any of the following occurs:

    • Blisters, redness, or open sores on your chest
    • Confusion, lightheadedness, or dizziness
    • Sensation of your heart fluttering (palpitations)
    • Sensation of a skipped or missed heartbeat, or an irregular pulse
    • Cough, difficulty breathing, shortness of breath
    • Severe nausea or vomiting
    • Chest pain or pain in your left arm or jaw
    • Pain in your abdomen, back, arms, or legs
    • Blood in your urine
    • Changes in vision or speech
    • Difficulty walking or using your limbs
    • Drooping facial muscles

    In case of an emergency, call for medical help right away.

  • Definition

    Cardioversion is the delivery of an electric shock to the chest through electrodes or paddles. The shock is given to correct a dangerous heart rhythm.

    Cardioversion can be done as an elective (scheduled) procedure or may be done urgently if an abnormal heartbeat is immediately life-threatening.

    External Cardioversion
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  • What to Expect

  • Reasons for Procedure

    If the heart is not beating regularly, it may prevent the normal circulation of blood through the body. This may deprive various organs, including the brain and heart, of oxygen. Without oxygen, the organs cannot properly function and will eventually die.

    In atrial fibrillation, the electrical signals from the atria are fast and irregular. The atria quiver, rather than contract. Some signals do not reach the ventricles and the ventricles continue pumping, usually irregularly and sometimes rapidly


    Non-emergency cardioversion may be used to treat the following conditions:

    • Atrial fibrillation—very rapid, irregular quivering in the atrium; ventricles pump irregularly
    • Atrial flutter—rapid but regular contractions in the atrium, when the ventricular heart rate is not too fast


    Emergency cardioversion may be used to treat the following types of irregular heartbeats, which can lead to death if they are not immediately converted to a more normal rhythm:


    • Atrial
      tachycardia—rapid beating of the heart, originating in the atrium with rapid ventricular heart rate
    • Ventricular tachycardia—rapid beating of the heart, originating in the ventricle
    • Ventricular fibrillation—rapid movement of the ventricular muscle without effective pumping
      (may be a fatal)

  • Possible Complications