Cryoablation of Medically Refractory Nodoventricular Tachycardia (original) (raw)
1990, Pacing and Clinical Electrophysiology
wide QRS tachycardia, based on a nodovenlricular accessory connection, is an uncommon arrhythmia. In this report, lhe endocardial and epicardial mapping and cryoobJafion of a nodoventricular fiber, documented to parficipate in medically re/rac(ory fachycardia in an ] 1-year-old boy, are described. Epicardial cryofhermia, applied at the earliest site of right ventricular activation, resulted in the abrupt termination of tachycardia. Endocardial cryothermia was subsequently applied in the perinodal region, the presumed sile of origin of the nodoventricular jiber. No tachyarrhythmias were inducible postoperatively, and no antiarrhythmic treatment has been required during 38 months of foUow-up. Based on precise anatomic localization of the nodoventricular connection, a definitive cure 0/associated tachyarrhythmias may be possible utilizing cryothermia, withoat the requirement for extensive intraoperative dissection.
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