Fig. 1. (Top ) Ventricular paced rhythm at 60 pulses/min. Small amplitude pacer spikes are seen before each paced QRS complex. Underlying P-wave activities at a rate of 100 beats/min are seen also. (Bottom ) Ventricular paced rhythm at 130 pulses/min immediately after cessation of electrocautery. Small amplitude pacer spikes are seen before each paced QRS complex.

Fig. 1. (Top ) Ventricular paced rhythm at 60 pulses/min. Small amplitude pacer spikes are seen before each paced QRS complex. Underlying P-wave activities at a rate of 100 beats/min are seen also. (Bottom ) Ventricular paced rhythm at 130 pulses/min immediately after cessation of electrocautery. Small amplitude pacer spikes are seen before each paced QRS complex.

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