Patent ID: 7761150

Claim:
A method of treating a cardiac event with a medical device having therapeutic componentry and a plurality of electrodes, comprising: sensing cardiac signals from the plurality of electrodes, the plurality of electrodes forming a first sensing vector and a second sensing vector; determining a first characteristic of the cardiac signals sensed by the first sensing vector over a predetermined sensing window and a first characteristic of the cardiac signals sensed by the second sensing vector over the predetermined sensing window; determining a second characteristic of the cardiac signals sensed by the first sensing vector different from the first characteristic of the first sensing vector over the predetermined sensing window and a second characteristic of the cardiac signals sensed by the second sensing vector different from the first characteristic of the second sensing vector over the predetermined sensing window; determining a third characteristic of the cardiac signals sensed by the first sensing vector different from the first characteristic of the first sensing vector and the second characteristic of the first sensing vector over the predetermined sensing window and a third characteristic of the cardiac signals sensed by the second sensing vector different from the first characteristic of the second sensing vector and the second characteristic of the second sensing vector over the predetermined sensing window; delivering a therapy from the therapeutic componentry based at least in part, on: a relationship of one of the first characteristic sensed by the first sensing vector and the first characteristic sensed by the second sensing vector and one of the second characteristic sensed by the first sensing vector and the second characteristic sensed by the second sensing vector; and a relationship of one of the first characteristic sensed by the first sensing vector and the first characteristic sensed by the second sensing vector and one of the third characteristic sensed by the first sensing vector and the third characteristic sensed by the second sensing vector.