Patent ID: 7890169
Filing Date: 2011-02-15
Classification: A61N

Abstract:
1. A method including: detecting, from a first electrode associated with a first heart chamber, a first fiducial point associated with a first depolarization of the first heart chamber during a first cardiac cycle; detecting, from a second electrode associated with a second heart chamber, a second fiducial point associated with a second depolarization of the second heart chamber during the first cardiac cycle; detecting, from the first electrode associated with the first heart chamber, a third fiducial point associated with a third depolarization of the first heart chamber during a second cardiac cycle, and in which the first and third fiducial points are substantially similarly located on the respective first and third depolarizations; detecting, from a third electrode associated with the second heart chamber, a fourth fiducial point associated with a fourth depolarization of the second heart chamber during the second cardiac cycle, in which the second and fourth fiducial points are substantially similarly located on the respective second and fourth depolarizations measuring a first time difference between the first and second fiducial points; measuring a second time difference between the third and fourth fiducial points; selecting the second electrode if the first time difference is longer than the second time difference, and selecting the third electrode if the second time difference is longer than the first time difference; and delivering from a selected electrode a subsequent stimulation for evoking a contraction of the second heart chamber.