Ultra-rapid atrial pacing as a form of rate control in postoperative automatic arrhythmias in patients with congenital heart disease

Figures

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  Figure 1. Telemetry demonstrating sinus rhythm with blocked and conducted atrial premature beats followed by a burst of narrow complex tachycardia at ∼270 beats per minute (bpm), with flattening of arterial line. The initiation of rapid atrial pacing at 700 bpm (85 ms) and resultant ventricular rate of 178 bpm resulted in an improvement in mean arterial pressures from 20s to 40s.

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  Figure 2. Telemetry demonstrating narrow complex, irregular tachycardia with variable P-wave morphologies followed by initiation of rapid atrial pacing at 800 beats per minute (bpm) (75 ms) with 6:1 conduction and a resultant ventricular rate of around 133 bpm (450 ms).

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  Figure 3. Twelve-lead electrocardiogram during rapid atrial pacing at 800 beats per minute (75 ms) with resultant 6:1 conduction, resulting in stabilization of the ventricular rate and hemodynamics.