Patent ID: 7587240

Claim:
A method of classifying a cardiac response to pacing, comprising: delivering a first pacing pulse to an atrium during a first cardiac cycle; sensing for an atrial evoked response following delivery of and associated with the first atrial pacing pulse sensing for an intrinsic activation of a ventricle during the first cardiac cycle; delivering a pacing pulse to the ventricle if the intrinsic ventricular activation is not sensed during the first cardiac cycle; sensing in the atrium for a retrograde P-wave, the retrograde P-wave responsive to the ventricular pacing pulse or the intrinsic ventricular activation; classifying the cardiac response to the first atrial pacing pulse as a non-captured response if the retrograde P-wave is detected and the atrial evoked response is not detected; and classifying the cardiac response to the first atrial pacing pulse as a captured response if the atrial evoked response is detected and the retrograde P-wave is not detected.