Patent ID: 8483812

Claim:
A system for detecting a cardiac event in a human patient, the system including: at least two electrodes adapted for implantation in a patient for obtaining an electrical signal from the patient's heart; an implantable device including a radio transceiver, a memory and a processor configured to: process the electrical signal to obtain R-R interval values and values of a heart signal parameter defining an ST deviation therefrom; categorize detected cardiac events into a low severity level and a high severity level based upon a combined function of said R-R interval values and said ST deviation values for comparison with a predetermined threshold for a selected R-R interval value; operative upon categorizing a cardiac event as a high severity level event, cause the transceiver to transmit a high severity event signal that includes both electrical signal waveform data associated with the high severity level event and an indication of the high severity level of the cardiac event; operative upon categorizing a cardiac event as a low severity level event, perform at least one of the following actions: (i) cause the transceiver to transmit a low severity event signal that includes both electrical signal waveform data associated with the low severity level event and an indication of the low severity level of the cardiac event; (ii) store electrical signal waveform data associated with the low severity level event.