Abstract Funding Acknowledgements Type of funding sources: None. Background and Aims Data regarding long-term follow-up radiofrequency catheter ablation (RFCA) accessory pathways (APs) in patients (P) with Ebstein's anomaly are limited. This type procedure is considered challenging due to multiple broad APs. The present study aimed describe the electrophysiological features APs P anomaly, repor...

BACKGROUND A reliable, noninvasive procedure to determine the location of accessory atrioventricular connections in patients with Wolff-Parkinson-White syndrome would add an important diagnostic tool to the clinical armamentarium. METHODS AND RESULTS Body surface potential mapping (BSPM) using 180 electrodes in various-sized vests and displayed as a calibrated color map was used to determine ...

Presentation A 19-year-old male with congenitally corrected transposition of the great arteries (ccTGA; S, L, L–situs solitus, l-loop, l-transposition) presented with recurrent frequent palpitations, fatigue, and effort intolerance. Previous history was significant for initial presentation with supraventricular tachycardia (SVT) at the age of 14 years. Transthoracic echocardiography at that tim...

AIMS Unlike in the Wolff-Parkinson-White syndrome, there has been no systematic study on the role of the pre-excitation pattern in predicting the ablation site in patients with atriofascicular (AF) pathways. We assessed in a large cohort the value of the 12-lead electrocardiogram (ECG) during antidromic tachycardia (ADT) to predict the site of ablation. METHODS AND RESULTS Forty-five patients...

OBJECTIVES This study sought to: 1) determine the feasibility of using 3-dimensional transthoracic echocardiography (3D TTE) in patients with implantable cardiac resynchronization devices, pacemakers, and defibrillators to visualize the device leads in the right heart and their position relative to the tricuspid valve leaflets; 2) determine the prevalence of different lead positions; and 3) stu...

A 3-year-old girl, weighing 11 kg, with a diagnosis of Ebstein’s anomaly was referred to our center due to recurrent supraventricular tachycardia (SVT) attacks resistance to multidrug medical therapy. She had a modified Blalock-Taussig shunt operation in the neonatal period, and thereafter suffered from recurrent SVT attacks compromising hemodynamics, requiring cardioversion. A surface electroc...

M anagement of hemodynamically significant supraventricular and ventricular tachyarrhythmias is often a difficult problem for the practicing cardiologist. Not only is there considerable controversy regarding the appropriate technique to guide the selection of therapy (i.e., noninvasive versus invasive techniques), but the available therapeutic options continue to expand. Antitachycardia therapy...

Catheter ablation of 215 accessory pathways (APs) using radiofrequency current (RF) was attempted in 204 consecutive patients. Two hundred twelve of the 215 (99%) APs were successfully ablated. After a minimum of follow-up period of 1 month (mean 8.5 +/- 5.4 months), AP conduction had returned in 17 patients (8%). Recurrence of AP conduction was manifest by atrioventricular (AV) reentrant tachy...

Dextroposition is a rare cardiac malformation defined as rightward displacement with leftward apex, vs. dextrocardia, which base-axis orientation. We report the second known case of dextroposition accessory pathway, presenting preexcited atrial tachycardia. Abnormal anatomy complicates ECG localization and pathway ablation. N/A A 50-year-old woman was admitted respiratory distress due to EBV in...

BACKGROUND AND OBJECTIVES During the index procedure of catheter ablation (CA) for atrial fibrillation (AF), it is important to assess whether other atrial or ventricular tachyarrhythmia coexist. Their symptoms are often attributed to residual tachycardia after successful elimination of AF by CA. This tachycardia could also be non-pulmonary vein (PV) foci initiated AF. This study examined the c...