Electrophysiological studies were performed in eight patients (four men and four women, mean (SD) age 24 (5) years with paroxysmal attacks of palpitation during or immediately after exercise. Five patients were competitive athletes at college. In two patients spontaneous supraventricular tachycardia during exercise was recorded by ambulatory electrocardiographic monitoring and in another it was...

Fifty-two patients with paroxysmal supraventricular tachycardia were studied to determine whether there was a circadian pattern to the occurrence of this arrhythmia. Antiarrhythmic therapy was discontinued, and patients were followed until they had one recurrence of tachycardia documented by telephone transmission of the electrocardiogram. By least-squares analysis, the times of day that the 52...

Fifty-two patients with paroxysmal supraventricular tachycardia were studied to determine whether there was a circadian pattern to the occurrence of this arrhythmia. Antiarrhythmic therapy was discontinued, and patients were followed until they had one recurrence of tachycardia documented by telephone transmission of the electrocardiogram. By least-squares analysis, the times of day that the 52...

The differentiation of the retrograde conduction pathway is essential for the diagnosis of paroxysmal supra ventricular tachycardia (PSVT). An eccentric retrograde atrial activation sequence during the tachycardia could give rise to a diagnosis of accessory pathway (AP) conduction. However, in the case of PSVT, which exhibits a concentric retrograde atrial activation sequence, it is confusing t...

A case of paroxysmal supraventricular tachycardia with Wolff-ParkinsonWhite syndrome in an Indonesian neonate born in the Departement of Obste­ trics, Dr. Hasan Sadikin General Hospital, Bandung, is reported. Tachycardia in the neonate was first noted at the iige of 6 days, but the heart rale gradually decreased in 8 hours after oxygen was administered. Electrocardiographic exa­ mination reveal...

Paroxysmal supraventricular tachycardia (SVT) is a common arrhythmia in the parturient and can occur with or without an underlying organic heart disease. A woman of 35 weeks' gestation, who had a paroxysmal SVT that was resistant to antiarrhythmic drugs and electric cardioversion, required emergency Cesarean delivery. The Cesarean delivery was performed under spinal anesthesia and a healthy bab...

A 29-year-old woman underwent an electrophysiologic procedure because of a 10-year history of recurrent episodes of paroxysmal supraventricular tachycardia. The baseline cycle length, atrial-His (AH), and His-ventricular (HV) intervals were 550, 50, and 45 msec, respectively. The AV block cycle length was 270 msec. With programmed atrial stimulation, there was no evidence of dual AV nodal pathw...