DETERMINATION OF UPPER LIMIT OF VULNERABILITY USING A VARIABLE NUMBER OF SHOCKS

摘要

An apparatus senses a cardiac electrical signal and determines a signal quality parameter of the cardiac electrical signal. A number of shock pulses to be delivered to a patient's heart is determined in response to the signal quality parameter. Each of the shock pulses are scheduled to be delivered at a unique offset from a T-wave shock interval in one embodiment of the disclosure.