Key result
EP study in narrow complex tachycardia reveals spontaneous transition to RBBB during catheter manipulation.
Case Report (n=1)
A case report describing spontaneous transition to right bundle branch block during narrow complex tachycardia induced by catheter manipulation.
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May alert electrophysiologists to catheter-induced RBBB during narrow-complex tachycardia EP studies; leaves open mechanistic questions for prospective investigation.
A 40-year-old male presented with recurrent episodes of documented narrow complex tachycardia (NCT). Baseline electrocardiogram (ECG) did not reveal any manifest preexcitation. During an electrophysiological (EP) study, he was noted to have spontaneous induction of narrow complex tachycardia during catheter manipulation. The ECG tracings from the EP system showed a spontaneous transition to right bundle branch block in the ongoing tachycardia. What is the likely mechanism of the tachycardia? Clinical trial registration: Not applicable.
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Mondal et al. (2026) conducted a case report in Narrow complex tachycardia (n=1). Electrophysiological study was evaluated. An electrophysiological study in a 40-year-old male with narrow complex tachycardia revealed a spontaneous transition to right bundle branch block during catheter manipulation.
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