Dec 1, 1987

Comparison of the ventricular response during atrial fibrillation in patients with enhanced atrioventricular node conduction and Wolff-Parkinson-White syndrome

Journal of the American College of Cardiology
S MilsteinR Yee

Abstract

Although ventricular fibrillation is a well known sequel to atrial fibrillation in the Wolff-Parkinson-White syndrome, ventricular fibrillation is not generally associated with supraventricular tachycardia in the presence of enhanced atrioventricular (AV) node conduction without pre-excitation. It was hypothesized that the ventricular response during atrial fibrillation may be less in patients with enhanced AV node conduction than in their counterparts with Wolff-Parkinson-White syndrome matched for anterograde effective refractory period. Slower ventricular rates during atrial fibrillation would suggest an increased propensity for concealed conduction in the enhanced AV node conduction group than in the group with an accessory pathway. Three groups of patients aged 16 to 65 years underwent electrophysiologic testing for supraventricular tachycardia or after surgical correction of Wolff-Parkinson-White syndrome. Sixteen patients had enhanced AV node conduction, 16 had Wolff-Parkinson-White syndrome and 16 had normal AV node conduction. Patients with enhanced AV node conduction and Wolff-Parkinson-White syndrome were well matched for anterograde effective refractory period (245 +/- 22 versus 258 +/- 25 ms) and minimal cycle leng...Continue Reading

Mentioned in this Paper

Ventricular Fibrillation
Supraventricular Tachycardia
Accessory Atrioventricular Bundle
Atrial Fibrillation
Accessory Atrioventricular Bundle (Body Structure)
Refractory Period
Cardiac Conduction System
Structure of Atrioventricular Node
Entire Atrioventricular Node
Heart Ventricle

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