Radiation exposure to operator and patients during cardiac electrophysiology study, radiofrequency catheter ablation and cardiac device implantation procedures

the results of our experience with radiofrequency catheter ablation of cardiac arrhythmias suggest that this technique can benefit an important number of patients with cardiac arrhythmias. During a mean follow-up of 4 months no preexcitation or reentrant tachycardia occurred. One patient had femoral arterial occlusion and was treated with no significant sequelae. Ablation was successful in 18/20 (90%) patients in 15/18 (83%) of successfully treated patients the same study was done for diagnosis and radiofrequency ablation.

The radiofrequency current energy applied was 40-50 V for 30-40 seconds. the mean time of the procedure was 4.1 hours. Nineteen patients had supraventricular tachyarrhythmias: One patient had atrial tachycardia and 1 atrial fibrillation with rapid ventricular rate, 5 patients had reentrant nodal tachycardia, 12 patients had reentrant atrioventricular tachycardia and 1 patient had right ventricular outflow tract tachycardia. Ten patients were men and 10 women with ages varying from 13 to 76 years (mean = 42.4 years). twenty patients with refractory cardiac arrhythmias were undertaken to electrophysiologic studies for diagnosis and radiofrequency catheter ablation of their reentrant arrhythmias. ĭe Paola, A A BalbÃ£o, C E Silva Netto, O MendonÃ§a, A Villacorta, H Vattimo, A C Souza, I A Guiguer JÃºnior, N Portugal, O P Martinez Filho, E EĮvaluate the efficacy of radiofrequency catheter ablation in patients with refractory cardiac arrhythmias.

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