Background. It is important to recognise Wolff-Parkinson-White (WPW) syndrome in electrocardiograms (ECG), as it may mimic ischaemic heart disease, ventricular hypertrophy, and bundle branch block. Recognising WPW syndrome allows for risk stratification, the identification of associated conditions, and the institution of appropriate management. Objective. The present case showed that electrophy...

34. Birkhead JS, Vaughan Williams EM: Dual effects of disopyramide on atrial and atrioventricular conduction and refractory periods. Br Heart J 39: 657, 1977 35. Desai JM, Scheinman M. Peters RW. O'Young J: Electrophysiological effects of disopyramide in patients with bundle branch block. Circulation 59: 215, 1979 36. LaBarre A, Strauss HC, Scheinman MM, Evans GT. Bashore T, Tiedeman JS, Wallac...

BACKGROUND Atrial flutter with 1:1 atrioventricular conduction via an accessory pathway is an uncommon presentation of Wolff-Parkinson-White syndrome not previously reported in the emergency medicine literature. Wolff-Parkinson-White syndrome, a form of ventricular preexcitation sometimes initially seen and diagnosed in the emergency department (ED), can present with varied tachydysrhythmias fo...

Most spiders are content to sit and wait for unsuspecting victims to blunder into their silken traps, but webs are only ever as good as the structures that secure them to the surfaces that support them. ‘This [attachment] is done with a special type of silk, called piriform’, says Jonas Wolff, from Macquarie University, Australia, adding that most spiders only produce this silk when they need t...

OBJECTIVES To review the clinical experience, complications and outcome of Cardiac Electrophysiology Studies and Catheter Radiofrequency Ablation in treatment of supraventricular tachycardias in Karachi. METHODS A retrospective review of records of all patients who underwent an electrophysiological study and radiofrequency ablation at National Institute of Cardiovascular Diseases and Aga Khan...

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...

Shortly after the Axis powers capitulated and World War II came to an end, UC-Berkley dropped a bombshell in 1948, which became known as the Wolff-Chaikoff (W-C) effect. Where the swords of many nations failed, the pens of two men succeeded. The W-C effect resulted in the removal of iodine from the food supply, and most likely caused a lot of misery and death in the US due to its negative impac...

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...

Background. A pace mapping technique using body surface potential maps (BSPMs) was developed to guide the positioning of an ablation catheter at the ventricular insertion point of accessory pathways (AP) in patients with the Wolff-Parkinson-White syndrome (WPW). Methods and Results. The study was performed on 30WPW patients. BSPMs were recorded with 63 leads distributed over the entire torso su...