Long RP' supraventricular tachycardias (SVT) often demonstrate both slow and decremental conduction properties in the retrograde pathway of the reentrant circuit. The electrophysiologic properties of these pathways are poorly understood. We studied 10 patients with long RP' SVT (RP'/RR, 0.52 to 0.71); five had the unusual form of atrioventricular nodal reentry (fast-slow) and five patients had ...

An 8-year-old boy diagnosed as having Wolff-ParkinsonWhite syndrome, with no structural heart defects, was referred for radiofrequency catheter ablation. The procedure was performed with the patient under deep sedation with intravenous midazolam and intravenous fentanyl. Two quadripolar electrode 5 Fr catheters (Bard®) were inserted percutaneously via the femoral vein and positioned consecutive...

Central MessageRepair of a severely dysplastic tricuspid valve can be successfully performed by 2-leaflet, 1-patch augmentation using crescent-shaped patch traversing the anteroseptal commissure.See Commentary on page XXX. Repair commissure. See non-Ebsteinoid dysplasia (TVD) is often challenging due to severe leaflet restriction and lack usable tissue.1Cleuziou J. Pringsheim M. Stroh A. Burri ...

Limited data are available on the use of irrigated contact force (CF) catheters for radiofrequency (RF) ablation permanent junctional reciprocating tachycardia (PJRT) in children. We considered five consecutive pediatric patients with diagnosis PJRT who underwent RF CF catheter guided by electroanatomic mapping, obtaining a low number pulses and minimal fluoroscopy exposure. High values not nec...

6 List of original papers 7 List of abbreviations 8 Introduction 9 Cardiac cellular electrophysiology 12 Recording cardiac electricity 16 Electrocardiography (ECG) 16 Vectorcardiography (VCG) 16 Pacemaker treatment 20 Sick Sinus Syndrome 21 Hypertrophic Obstructive Cardiomyopathy (HOCM) 21 Wolff-Parkinson-White Syndrome (WPW syndrome) 22 Aims 23 Material and Methods 24 Studies I and II 24 Study...

Central MessageSuspicion of myocardial ischemia right after cardiac surgery requires prompt clinical evaluation and transfer to the catheterization laboratory or operating room, if deemed necessary.See Commentaries on pages 1202 1203.Feature Editor's Introduction—Diagnosing infarction following can be challenging. Hospitals have different activation protocols when is suspected, which ultimately...

Since the advent of catheter ablation for atrial fibrillation (AF) aiming the pulmonary veins a few years ago, there has been an overwhelming interest and a dramatic increase in AF investigation. AF has a different dimension in the context of the Wolff-Parkinson-White (WPW) syndrome. Indeed, AF may be a nightmare in a young person that has an accessory pathway (AP) with fast anterograde conduct...