A method of treating a patient for ventricular tachycardia using a wearable defibrillator includes monitoring the patient for a predetermined condition via one or more electrodes on the defibrillator, sending a message to the patient in response to the predetermined condition, activating the defibrillator...http://www.google.de/patents/US6671545?utm_source=gb-gplus-sharePatent US6671545 - Defibrillator with controller operating in a low power mode
