Key result
Fast pathway ablation using cryotherapy was performed in a 53-year-old man with AVNRT and a PR interval >400 ms, using single echoes to monitor pathway function.
Case Report (n=1)
Cryotherapy can be utilized for fast pathway ablation in AVNRT patients with a prolonged PR interval.
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May support cryotherapy for fast pathway ablation in select AVNRT with long PR; hypothesis-generating and requires prospective validation.
A 53-year-old man with previous aortic valve surgery presented with paroxysmal narrow complex tachycardia, induced by exercise. His PR interval was greater than 400 ms when in sinus rhythm and atrioventricular nodal reentry tachycardia (AVNRT) was diagnosed with invasive electrophysiological studies. Single echoes were repeatedly inducible with single-paced extrastimuli. Cryotherapy was then used to ablate the fast pathway using single echoes to monitor anterograde slow pathway and retrograde fast pathway function during ablation.
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Linton et al. (2010) conducted a case report in Atrioventricular nodal reentry tachycardia (AVNRT) (n=1). Fast pathway ablation using cryotherapy was evaluated. Fast pathway ablation using cryotherapy was performed in a 53-year-old man with AVNRT and a PR interval >400 ms, using single echoes to monitor pathway function.
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