Jan 1, 1997

Long-term follow-up after radiofrequency modification of the atrioventricular node in patients with atrial fibrillation

Journal of the American College of Cardiology
F MoradyM Bahu


The purpose of this study was to describe the long-term follow-up results in 62 patients with atrial fibrillation and an uncontrolled ventricular rate, who underwent radiofrequency modification of the atrioventricular (AV) node. Previous studies in small numbers of patients have suggested that radiofrequency modification may be effective in controlling the ventricular rate in patients with atrial fibrillation, but long-term follow-up data have been lacking. The subjects of this study were 62 consecutive patients (mean age +/- SD 65 +/- 14 years; 43 with structural heart disease) who underwent an attempt at radiofrequency modification of the AV node because of symptomatic, drug-refractory atrial fibrillation with an uncontrolled ventricular rate. The atrial fibrillation was chronic in 46 patients and paroxysmal in 16. Radiofrequency energy was applied to the posteroseptal or mid-septal right atrium to lower the ventricular rate in atrial fibrillation to 120 to 130 beats/min during an infusion of 4 micrograms/min of isoproterenol. Short-term control of the ventricular rate was successfully achieved without the induction of pathologic AV block in 50 (81%) of 62 patients. Inadvertent high degree AV block occurred in 10 (16%) of 62 ...Continue Reading

Mentioned in this Paper

Cardiomyopathy, Familial Idiopathic
Heart Block
Ventricular Tachycardia, Catecholaminergic Polymorphic,1 (Disorder)
Recurrent Malignant Neoplasm
Right Atrial Structure
Left Ventricular Function
Cardiopulmonary Exercise Test
Atrial Fibrillation
Atrioventricular Block

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