This case highlights that complete AV block can rarely occur as a delayed, albeit transient, complication 1 week after radiofrequency ablation for AVNRT.
Alerts to rare delayed AV block after AVNRT ablation; hypothesis-generating for extended monitoring protocols.
Atrioventricular (AV) block following radiofrequency (RF) ablation for the treatment of AV nodal re-entrant tachycardia (AVNRT) is a rare but serious complication of this procedure. Almost all such cases occur during or immediately after radiofrequencey (RF) energy application, followed by prompt recovery. The present report describes a 22-year-old woman with first-degree AV block on electrocardiography, who developed complete AV block 1 week after RF ablation for the treatment of the uncommon form of AVNRT (slow/slow). The patient's complete AV block persisted for another 1 week before she recovered.
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Takahashi et al. (2002) studied this question.
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