Key result
Electrophysiologic studies in 2 patients with persistent atrial tachycardia suggest an ectopic atrial focus is responsible, showing relative immunity to overdrive pacing up to 600 beats/min.
Population
2 patients with chronic persistent atrial tachycardia unresponsive to drug or electroconversion therapy
Design
Case_series
Authors
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May inform mechanism in refractory cases; hypothesis-generating and should not change practice without validation.
Case Report (n=2)
Electrophysiologic studies in patients with refractory persistent atrial tachycardia suggest an ectopic atrial focus mechanism with distinct responses to overdrive pacing compared to the sinoatrial node.
Scheinman et al. (1974) conducted a case report in chronic persistent atrial tachycardia (n=2). Electrophysiologic studies was evaluated on Electrophysiologic response to pacing and pharmacological interventions. Electrophysiologic studies in 2 patients with persistent atrial tachycardia suggest an ectopic atrial focus is responsible, showing relative immunity to overdrive pacing up to 600 beats/min.
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