Spontaneous Transition of Double Tachycardias with Atrial Fusion in a Patient with Wolff-Parkinson-White Syndrome
نویسندگان
چکیده
Among patients with Wolff-Parkinson-White syndrome, atrioventricular reciprocating tachycardia (AVRT) and atrioventricular nodal reentrant tachycardia (AVNRT) can coexist in a single patient. Direct transition of both tachycardias is rare; however, it can occur after premature atrial or ventricular activity if the cycle lengths of the two tachycardias are similar. Furthermore, persistent atrial activation by an accessory pathway (AP) located outside of the AV node during ongoing AVNRT is also rare. This article describes a case of uncommon atrial activation by an AP during AVNRT and gradual transition of the two supraventricular tachycardias without any preceding atrial or ventricular activity in a patient with preexcitation syndrome.
منابع مشابه
Radiofrequency catheter ablation in the treatment of Wolff-Parkinson-White syndrome
Introduction: Tachyarrhythmias in Wolf Parkinson White (WPW) syndrome, can be a life threatening factor. Antiarrhythmic drug therapy in this syndrome, has not been completely acceptable. Efficacy, safety and economy of Radio Frequency Catheter Ablation (RFCA) in western studies, has made it as the treatment of choice. In the present study, efficacy of RFCA in the ablation of accessory pathway...
متن کاملHis bundle recordings in patients with reciprocating tachycardias and Wolff-Parkinson-White syndrome.
The mechanisms of reciprocating tachyeardias were studied in three patients with WPW syndrome using the catheter technic of His bundle recordings. In the first case it could not be determined with certainty whether the tachycardias involved two anatomically independent fascicles or a single longitudinally dissociated pathway. They were terminated by carotid sinus pressure, which caused A-V noda...
متن کاملHis Bundle Recordings in Patients with Reciprocating Tachycardias and Wolff - Parkinson - White Syndrome By CESAR
The mechanisms of reciprocating tachyeardias were studied in three patients with WPW syndrome using the catheter technic of His bundle recordings. In the first case it could not be determined with certainty whether the tachycardias involved two anatomically independent fascicles or a single longitudinally dissociated pathway. They were terminated by carotid sinus pressure, which caused A-V noda...
متن کاملElectrocardiographic diagnosis of dual AV nodal pathways complicating the Wolff-Parkinson-White syndrome.
he diagnosis of dual AV nodal pathways compliTcating concealed or manifest preexcitation, is usually made at the time of electrophysiologic study in pa tien ts with recurrent paroxysmal supraventriculax tachycardia. In these patients, electrophysiologic studies demonstrate discontinuous antegrade AV nodal conduction curves (dual AV nodal pathways, fast and slow), as well as a unior bidirectiona...
متن کاملVerapamil in the treatment of paroxysmal supraventricular tachycardia
Verapamil is a novel antiarrhythmic agent which appears to act as a calcium-ion antagonist, blocking calcium transport across the myocardial cell membrane. It was given intravenously, in a dose of 10 mg, to thirty-two patients suffering from paroxysmal supraventricular tachycardia, and sinus rhythm was achieved promptly in all. Identical results were obtained in a further ten patients with supr...
متن کامل