Wen-Chung Yu

Double multielectrode mapping catheters facilitate radiofrequency catheter ablation of focal atrial fibrillation originating from pulmonary veins.

Ablation of Focal AF. Introduction: Several reports have demonstrated that focal atrial fibrillation (AF) may arise from pulmonary veins (PVs). The purpose of this study was to investigate the safety and efficacy of using double multielectrode mapping catheters in ablation of focal AF.

Role of Right Middle Pulmonary Vein in Patients with Paroxysmal Atrial Fibrillation

Right Middle Pulmonary Vein and AF. Introduction: Elimination of the ectopic foci from pulmonary veins (PVs) has proved to be a curative therapy for focal atrial fibrillation (AF). However, information about the importance of the right middle PV (RMPV) in initiation of AF and radiofrequency ablation of AF is limited.

Bezold‐Jarisch‐Like Reflex During Radiofrequency Ablation of the Pulmonary Vein Tissues in Patients with Paroxysmal Focal Atrial Fibrillation

Pulmonary Vein Ablation‐Induced Bradycardia. Introduction: Information is lacking about the occurrence of radiation‐related proarrhythmic events during application of radiofrequency (RF) energy at (he pulmonary veins in patients with paroxysmal focal atrial fibrillation. The purpose of this study was to assess the theoretical risk of reflex bradycardia and hypotension response during RF ablation of these regions rich in endocardial nerve terminals.

Persistent atrial flutter in patients treated for atrial fibrillation with amiodarone and propafenone: Electrophysiologic characteristics, radiofrequency catheter ablation, and risk prediction

Antiarrhythmic Drug‐Related Atrial Flutter. introduction: Antiarrhythmic drugs have been reported to promote the conversion of atrial fibrillation to atrial flutter inn patients with paroxysmal atrial fibrillation. However, information about the electrophysiologic mechanism and response to radiofrequency ablation of these drug‐induced atrial flutters is limited. Furthermore, the determinants of the development of persistent atrial flutter in patients treated for atrial fibrillation with antiarrhythmic drugs are still unknown.

Electrophysiologic Characteristics and Radiofrequency Catheter Ablation in Patients with Clockwise Atrial Flutter

RF Catheter Ablation of Clockwise Atrial Flutter. introduction: Although the mechanism and radiofrequency catheter ablation of counterclockwise (typical) atrial flutter have been studied extensively, information about the electrocardiographic and electropbysiologic characteristics and effects of radiofrequency ablation in patients with clockwise atrial flutter is limited.

Dimension and Related Anatomical Distance of Koch's Triangle in Patients with Atrioventricular Nodal Reentrant Tachycardia

Kochs Triangle in AVNRT. Introduction: The dimension of Kochs triangle in patients with AV nodal reentrant tachycardia has not been well described. Understanding the dimension and anatomical distance related to Kochs triangle might be useful in avoiding accidental AV block during ablation of the slow pathway. The purposes of this study were to define the dimension of Kochs triangle and its related anatomical distance and correlate these parameters with the successful ablation sites in patients with AV nodal reentrant tachycardia.

Effects of 17β-Estradiol on Tachycardia-Induced Changes of Atrial Refractoriness and Cisapride-Induced Ventricular Arrhythmia

17β‐Estradiol and Arrhythmia. Introduction: Gender difference is known to be associated with the occurrence of arrhythmia. However, the effects of female sex hormone on atrial electrophysiology, and on the occurrence of torsades de pointes (TdP) induced by cisapride have been unclear.

Mechanisms of Transition Between Double Paroxysmal Supraventricular Tachycardias

Double Paroxysmal Supraventricular Tachycardias. Introduction: Coexistence of double tachycardias in one patient has been infrequently reported. Furthermore, the mechanisms of transition between double paroxysmal supraventricular tachycardias have not been well studied.

Electrophysiologic Characteristics and Radiofrequency Catheter Ablation in Atrioventricular Node Reentrant Tachycardia with Second‐Degree Atrioventricular Block

Second‐Degree AV Block During AVNRT. Introduction: Detailed electrophysiologic study of AV nodal reentrant tachycardia (AVNRT) with 2:1 AV block has been limited.

Pulmonary vein electrogram characteristics in patients with focal sources of paroxysmal atrial fibrillation

Pulmonary Vein Electrogram in Paroxysmal AF. Introduction: The major source of ectopic beats initiating paroxysmal atrial fibrillation (AF) is from pulmonary veins (PVs). However, the electrogram characteristics of PVs are not well defined.