Medications
Who needs an implantable cardioverter-defibrillator?
The heart's ability to beat steadily for a lifetime is a testament to tough muscle and an amazing electrical system. Sometimes, though, the heart veers into an abnormal rhythm. Two potentially deadly ones are ventricular tachycardia and ventricular fibrillation. One effective way to abort these rhythms and restore a normal one is with an electrical shock.
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