Patent ID: 8010186

Claim:
A system that is configured to approximate a location of a fibrillation driver within a heart, the system comprising: a. a plurality of electrodes configured to sense, at each of a respective location in the heart, a signal comprising a plurality of cardiac cycles each having a corresponding cardiac cycle length; and b. a computer that is coupled to the electrodes and configured to: calculate, for each of a plurality of the locations, a plurality of cardiac cycle length values for the signal sensed at the location and a standard deviation of the plurality of calculated cardiac cycle length values for the signal sensed at the location using only the plurality of calculated cardiac cycle length values calculated for that location, directly compare each of the respective calculated standard deviations to each of the other respective calculated standard deviations to determine the smallest standard deviation, and identify the location with the smallest standard deviation of cardiac cycle length values as the location closest to the fibrillation driver.