Dual-demand pacing for reciprocating atrioventricular tachycardia.

Area of Science:

• Cardiology
• Electrophysiology
• Medical Devices

Background:

• Reciprocating atrioventricular tachycardia is a common arrhythmia associated with Wolff-Parkinson-White syndrome.
• Intractable paroxysmal tachycardia poses significant challenges in patient management.

Observation:

• Two patients with Wolff-Parkinson-White syndrome exhibited rapid and consistent responses to programmed electrical stimulation.
• The tachycardia initiation and termination patterns were analyzed during electrical stimulation.

Findings:

• Fixed-rate pacing demonstrated efficacy in terminating reciprocating atrioventricular tachycardia in both patients.
• A modified demand pacemaker, switching to fixed-rate mode during tachycardia, successfully terminated the arrhythmia.

Implications:

• This approach presents a promising therapeutic strategy for patients with drug-refractory paroxysmal tachycardia.
• Individualized electrophysiological studies are crucial to identify suitable candidates for this pacing strategy.