WPW syndrome is a rare congenital heart disease due to an accessory pathway between the atrium and the ventricle. Its ECG pattern is characterized by a short PR interval, a delta wave, a wide QRS complex and an abnormal ventricular repolarisation. Patients are usually asymptomatic, or have frequent paroxysmal episodes of tachycardia. These tachycardias are supraventricular tachycardias related ...

Muscular septal aneurysms are extremely rare without a ventricular septal defect and are diagnosed accidentally in most cases. Reported cases generally have rhythm disturbance or electrocardiographic findings of Wolf-Parkinson-White (WPW) syndrome. Presently described are 2 cases of ventricular septal aneurysm associated with WPW syndrome, which presented as dilated cardiomyopathy. Pre-excitati...

A surface electrocardiogram showing type B Wolff-Parkinson-White syndrome pattern was part of the cardiac findings in a female of 24 with florid features of tuberous sclerosis. She had cardiomegaly but no intracardiac tumour was demonstrated. Wolff-Parkinson-White syndrome, though rare, has previously been described in association with tuberous sclerosis in children but not before in adults.

minor discrepancies existing. It is generally accepted that in the presence of anomalous bypass conduction or preexcitation the QRS complexes are the result of a first component due to anomalous bypass conduction and a second component due to the normal atrioventricular conducted impulse. Vera et al.' have shown that the participation of each of these two components in building up or fusing tog...

This paper reports a patient with Wolff-Parkinson-White syndrome who presented with a tachycardia showing an unusual QRS morphology closely resembling that of a ventricular tachycardia. On reversal to a normal rhythm the electrocardiogram showed changes of a type A preexcitation, with subsequent conversion to a type B pattern. This phenomenon was observed on two separate occasions. Such convers...

T HE electrocardiographic pattern of short P-R interval and prolonged QRS with a normal P-S (Wolff-Parkinson-White syndrome, pre-excitation) has fascinated physicians since its description by Wolff, Parkinson, and White in 1930.1 Many theories have been advanced and numerous studies reported in an effort to explain this particular electrocardiographic pattern.2-4 Of the many concepts proposed, ...

The WolfParkinsonWhite (WPW) syndrome is a condition with early excitation of the heart ventricles due to conduction an electrical pulse along atrioventricular pathway, such as Kent, James bundle, and Mahaim fibers; usually accompanied by supraventricular tachycardia, reciprocal tachycardia in 95% cases, fibrillation, atrial flutter, other cases. WPW can be observed patients any age, approximat...

Concealed conduction into accessory atrioventricular pathways has been postulated to explain variability of R-R intervals during atrial fibrillation in patients with Wolff-Parkinson-White syndrome. We examined the occurrence of concealed conduction into atrioventricular pathways using extrastimulus techniques in 26 consecutive patients undergoing electrophysiologic studies for the Wolff-Parkins...