Effect of Verapamil on an Accessory Pathway Manifesting as 'Fatigue Phenomenon' in Wolff-Parkinson-White Syndrome
| Autor: | Bobby A. Smith, Osarmu Fujimura, Chien-Suu Kuo |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Male
Pulmonary and Respiratory Medicine Time Factors Refractory Period Electrophysiological Accessory pathway Critical Care and Intensive Care Medicine Electrocardiography Heart Conduction System Heart rate medicine Humans Sinus rhythm cardiovascular diseases Atrial pacing business.industry Atrioventricular conduction Cardiac Pacing Artificial Middle Aged Delta wave Heart Block Verapamil Anesthesia Injections Intravenous cardiovascular system Ventricular preexcitation Wolff-Parkinson-White Syndrome Cardiology and Cardiovascular Medicine business medicine.drug |
| Zdroj: | Chest. 104:305-307 |
| ISSN: | 0012-3692 |
| Popis: | 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 manner. Administration of 5 mg of intravenous verapamil during sinus rhythm abolished the delta waves. These observations may indicate that pathologic changes in the accessory pathway are responsible for these phenomena. |
| Databáze: | OpenAIRE |
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