Patent ID: 8880162

Claim:
A method for detecting events in cardiac signals originating from at least two signal channels in a cardiac medical device, the method comprising the following steps: a. identifying an initial indication of an event in signal samples from at least one of the signal channels, b. deciding whether or not the identified initial indication confirms the event depending on the quality of the signal channels in which initial indications are identified, each signal channel's quality being dependent on: (1) the number of consecutive samples in the signal channel exceeding a settable detection threshold, and (2) the number of times a noise timer for the signal channel is restarted, the noise timer being with the cardiac medical device, wherein the channel's noise timer is restarted if: i. a sample magnitude for the signal channel rises above a settable noise threshold, or ii. a sample polarity for the signal channel changes while the sample magnitude remains above the settable noise threshold; and c. determining a point-of-detection for the event depending on: (1) the quality of the signal channels, and (2) the shape of the signal.