Patent ID: 8301235

Claim:
A method of discriminating cardiac events, comprising: sensing cardiac signals along a first sensing vector and a second sensing vector different from the first sensing vector; determining a first match score corresponding to the cardiac signals sensed along the first sensing vector; determining whether the first match score is within one of a first match zone corresponding to a first cardiac event, and a second match zone corresponding to the first cardiac event; determining a second match score corresponding to the cardiac signals sensed along the second sensing vector; determining whether the second match score is within one of the first match zone, the second match zone, and a third match zone corresponding to a second cardiac event different from the first cardiac event; performing one of increasing and decreasing an event counter in response to both the determination of whether the first match score is within one of the first match zone and the second match zone and the determination of whether the second match score is within one of the first match zone, the second match zone, and the third match zone; and discriminating cardiac events in response to the event counter.