Patent ID: 8768463
Filing Date: 2014-07-01
Classification: A61N

Abstract:
1. A method for defining continuous heart rate vs. AV delay values by defining a regression trend line using three points, the points comprising: (a) resting heart rate and AV delay at rest; (b) heart rate at optimal AV delay during light exercise; (c) upper tracking or paced heart rate and AV delay at upper tracking or paced heart rate; communicating said points to a pacemaker programmer for use in programming a pacemaker; wherein the AV delay value for points (a) and (c) is determined using an equation for ventricular filling time; and wherein the equation for AV delay for points (a) and (c) is AV delay={(60,000/HR×0.5)×0.75}×0.58 msec, whereby the 60000/HR term equals the conversion of HR in bpm to msec as an R to R interval or cycle length; 0.5 is the estimate of total diastolic filling time in the cardiac cycle; 0.75 is the correction/conversion of total diastolic filling time minus the isovolumic phase to active and passive ventricular filling; and 0.58 msec is the average conversion factor of the PR interval (diastolic filling time) to an AV delay value.