Key result
Cryoablation of the slow pathway in two patients with AV nodal re-entrant tachycardias resulted in unexpected transient AV block immediately after the procedure.
Why the study?
Does cryoablation of the slow pathway cause transient AV block in patients with AV nodal re-entrant tachycardias?
Case Report (n=2)
Does cryoablation of the slow pathway cause transient AV block in patients with AV nodal re-entrant tachycardias?
This report highlights a rare, unexpected phenomenon of transient AV block occurring immediately after uneventful cryoablation for AV nodal re-entrant tachycardia.
Transient AV block may follow cryoablation for AVNRT; this case report leaves open incidence and clinical relevance.
We report two patients with atrioventricular (AV) nodal re-entrant tachycardias who developed transient AV block immediately after uneventful cryoablation of the slow pathway was completed. No tachycardia recurrences were observed after an asymptomatic follow-up of 12 months and 10 months, respectively. This is the first report of this unexpected, transient phenomenon. The exact mechanism(s) remain(s) unclear.
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González‐Torrecilla et al. (2007) conducted a case report in Atrioventricular (AV) nodal re-entrant tachycardias (n=2). Cryoablation of the slow pathway was evaluated on Transient AV block and tachycardia recurrence. Cryoablation of the slow pathway in two patients with AV nodal re-entrant tachycardias resulted in unexpected transient AV block immediately after the procedure.
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