Patent ID: 7260433

Claim:
A system comprising: an implantable subcutaneous device comprising: at least two subcutaneous electrodes adapted for placement external to a heart; a cardiac output monitor that monitors cardiac output; an arrhythmia detector that detects a tachyarrhythmia of the heart; a first pulse generator that delivers one or more of anti-tachycardia pacing therapy, cardioversion therapy or defibrillation therapy to the heart using the at least two subcutaneous electrodes; a telemetry device; a processor programmed to withhold anti-tachycardia pacing therapy upon onset of a tachyarrhythmia, while cardiac output is monitored for a decrease in value and to output a command through the telemetry device to deliver anti-tachycardia pacing pulses in response to detection of a decrease in cardiac output accompanying the tachyarrhythmia; and a fully implanted stimulation device comprising: at least one intracardiac electrode adapted for placement within a heart; a second pulse generator that delivers one or more of anti-tachycardia pacing therapy, cardioversion therapy or defibrillation therapy to the heart using the at least one intracardiac electrode in response to the command from the telemetry device.