title: Monitoring an unstable heart. Implantable cardioverter-defibrillators.
mesh_terms: D001334:Automobile Driving; D001919:Bradycardia / Q000628:therapy; D002304:Cardiac Pacing, Artificial / Q000379:methods*; D017147:Defibrillators, Implantable; D004554:Electric Countershock / Q000379:methods; D006323:Heart Arrest / Q000209:etiology / Q000517:prevention & control*; D006801:Humans; D012307:Risk Factors; D017180:Tachycardia, Ventricular / Q000150:complications / Q000628:therapy; D014693:Ventricular Fibrillation / Q000150:complications / Q000628:therapy