Patent ID: 8135463
Filing Date: 2012-03-13
Classification: A61N

Abstract:
1. A method for setting an optimal atrial to ventricular (AV) interval in a pacing device, the method comprising: measuring the impedance for at least two points in a cardiac cycle to produce measured impedance data; calculating an impedance change using the measured impedance data; searching for an AV interval causing the largest impedance change, wherein the AV interval searching includes varying the AV interval responsive to the measured impedance change to converge on the largest impedance change; and setting the AV interval in the pacing device to the AV interval causing the largest impedance change and wherein the measuring impedance includes compensating for respiratory impedance by utilizing a means for compensating for respiratory impedance includes one of waiting for breath hold, impedance measuring during windows of low respiratory impedance change, and filtering.