Effects of verapamil on electrophysiological properties of anomalous atrioventricular connexion in Wolff-Parkinson-White syndrome.
نویسندگان
چکیده
منابع مشابه
Wolff-Parkinson-White syndrome (type A) complicated by heart block in both normal and accessory pathways.
A 67-year-old man with Wolff-Parkinson-White syndrome type A presented with second degree atrioventricular block in anomalous pathway and complete infra-Hisian block in the His-Purkinje pathway. He had increasingly frequent attacks of dizziness not related to exercise. A permanent ventricular demand pacemaker was successfully implanted following intracardiac electrophysiological studies.
متن کاملAcceleration of the ventricular response during atrial fibrillation in the Wolff-Parkinson-White syndrome after verapamil.
We examined the electrophysiologic effects of verapamil in eight patients with the Wolff-Parkinson-White syndrome. Verapamil shortened the antegrade effective refractory period of the accessory pathway in three patients and abbreviated the shortest cycle length with 1:1 conduction over the accessory pathway in two patients. More significantly, verapamil decreased the shortest RR interval betwee...
متن کاملConcealed pre-excitation causing paroxysmal reciprocating atrioventricular tachycardia in infancy.
We report 3 infants with Wolff-Parkinson-White (WPW) syndrome who presented with life-threatening paroxysmal reciprocating atrioventricular tachycardia in their first month of life. The diagnosis was confirmed by electrophysiological studies at ages 2--4 years, but the characteristic ECG of pre-excitation has not been shown in one patient and was first recorded at 2 and 3 years in the other two...
متن کاملWolff-Parkinson-White Syndrome After Verapamil
We examined the electrophysiologic effects of verapamil in eight patients with the WolffParkinson-White syndrome. Verapamil shortened the antegrade effective refractory period of the accessory pathway in three patients and abbreviated the shortest cycle length with 1:1 conduction over the accessory pathway in two patients. More significantly, verapamil decreased the shortest RR interval between...
متن کاملEffect of verapamil on an accessory pathway manifesting as "fatigue phenomenon" in Wolff-Parkinson-White syndrome.
Electrophysiologic study was performed in a 52-year-old man with type A ventricular preexcitation. An accessory atrioventricular pathway with no ventriculoatrial conduction was localized to the posteroseptal region. "Fatigue phenomenon," defined as suppression of atrioventricular conduction following rapid pacing, was observed to be provoked by atrial pacing in a rate- and duration-dependent ma...
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ورودعنوان ژورنال:
- British heart journal
دوره 36 3 شماره
صفحات -
تاریخ انتشار 1974