	US 7,587,240 B2
	Atrial capture verification
Geng Zhang, Newbury Park, Calif. (US); Ankur Garg, Minneapolis, Minn. (US); and Douglas R. Daum, Oakdale, Minn. (US)
Assigned to Cardiac Pacemakers, Inc., St. Paul, Minn. (US)
Filed on Dec. 15, 2004, as Appl. No. 11/12,433.
Prior Publication US 2006/0129197 A1, Jun. 15, 2006
Int. Cl. A61N 1/365 (2006.01)

U.S. Cl. 607—14 [607/9; 607/27; 607/28]

19 Claims

1. 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.