Heart rhythm : the official journal of the Heart Rhythm Society
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Comparative Study
Cryoballoon temperature predicts acute pulmonary vein isolation.
Cryoballoon pulmonary vein isolation (PVI) currently requires a long cryoballoon application (CBA) time of 240 to 300 seconds, thus repeated ineffective CBA prolongs procedure duration. We hypothesized that cryoballoon temperature (CBT) may be used to discriminate between effective and ineffective CBA during freezing. ⋯ Balloon temperature predicts successful target PVI during cryoablation and may serve in the early identification of noneffective balloon applications.
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Multicenter Study Comparative Study
Management and outcomes of cardiac tamponade during atrial fibrillation ablation in the presence of therapeutic anticoagulation with warfarin.
Cardiac tamponade (CT) is a possible complication of radiofrequency catheter ablation (RFCA) of atrial fibrillation (AF). Although the incidence of CT is not higher when RFCA is performed with a therapeutic international normalized ratio (INR), outcomes of CT are unclear. ⋯ Cardiac tamponade is not more severe or difficult to manage in the presence of therapeutic anticoagulation with warfarin in patients undergoing RFCA of AF.
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Comparative Study
Arrhythmia characterization and long-term outcomes in catecholaminergic polymorphic ventricular tachycardia.
Catecholaminergic polymorphic ventricular tachycardia (CPVT) is characterized by adrenergically induced ventricular tachycardia (VT) associated with syncope and sudden death. ⋯ Ventricular arrhythmia in CPVT is often initiated from the outflow tract region. Despite β-blocker therapy and selective ICD implantation, breakthrough arrhythmias occur and may be associated with adverse outcomes.