Key result
Atrial pacing from the coronary sinus successfully overcame intra-atrial conduction block mimicking AV nodal block and resulted in AV nodal conduction.
Case Report (n=1)
Intra-atrial conduction block can mimic AV nodal block during cavotricuspid isthmus ablation and can be successfully managed with atrial pacing from the coronary sinus.
Coronary sinus pacing may clarify intra-atrial versus AV nodal block during ablation; single case leaves open need for prospective validation.
Intra‐Atrial Conduction Block . A 42‐year‐old woman with a history of cardiomyopathy and multiple ablation procedures for atrial tachycardia developed intra‐atrial conduction block that mimicked atrioventricular (AV) nodal block during radiofrequency ablation at the cavotricuspid isthmus. She was treated with atrial pacing (from the coronary sinus), which overcame intra‐atrial conduction block and resulted in AV nodal conduction. (J Cardiovasc Electrophysiol, Vol. 23, pp. 1258–1261, November 2012)
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Chugh et al. (2012) conducted a case report in Cardiomyopathy and atrial tachycardia (n=1). Atrial pacing (from the coronary sinus) was evaluated on Overcoming intra-atrial conduction block and resulting in AV nodal conduction. Atrial pacing from the coronary sinus successfully overcame intra-atrial conduction block mimicking AV nodal block and resulted in AV nodal conduction.
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