Capture is evidenced on the EKG by the presence of

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Capture on an EKG is evidenced by the presence of P waves or QRS complexes following the pacemaker spikes. This indicates that the electrical impulse from the pacemaker has successfully depolarized the atria or ventricles and produced a contraction. Pacemaker spikes at regular intervals (B) and an appropriate distance between intrinsic beats and paced beats (D) are also indicators of successful capture, but they do not directly show evidence on the EKG. Paced beats on top of intrinsic beats (C) can indicate oversensing or a failure to sense intrinsic activity, rather than capture.

Capture Is Evidenced on the EKG by the Presence of