A pacing spike that precedes a P wave indicates which type of pacing?

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Multiple Choice

A pacing spike that precedes a P wave indicates which type of pacing?

Explanation:
A pacing spike that is followed by a P wave shows the impulse is stimulating the atrial myocardium. When the pacemaker delivers a stimulus and the atria depolarize, the resulting P wave appears after the spike. That pattern confirms atrial pacing. If the spike were followed by a QRS complex, it would indicate ventricular pacing, and if spikes appear before both a P wave and a QRS, that would be dual-chamber pacing.

A pacing spike that is followed by a P wave shows the impulse is stimulating the atrial myocardium. When the pacemaker delivers a stimulus and the atria depolarize, the resulting P wave appears after the spike. That pattern confirms atrial pacing. If the spike were followed by a QRS complex, it would indicate ventricular pacing, and if spikes appear before both a P wave and a QRS, that would be dual-chamber pacing.

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