Patrick Tchou
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View article: LBBB and heart failure—Relationships among QRS amplitude, duration, height, LV mass, and sex
LBBB and heart failure—Relationships among QRS amplitude, duration, height, LV mass, and sex Open
Background Height, left ventricular (LV) size, and sex were proposed as additional criteria for patient selection for cardiac resynchronization therapy (CRT) but their connections with the QRS complex in left bundle branch block (LBBB) are…
View article: Atrial Fibrillation Ablation in Young Adults: Measuring Quality of Life Using Patient-Reported Outcomes Over 5 Years
Atrial Fibrillation Ablation in Young Adults: Measuring Quality of Life Using Patient-Reported Outcomes Over 5 Years Open
Background: Ablation is used for both rhythm control and improved quality of life (QoL) in atrial fibrillation (AF). It has been suggested that young adults may experience high recurrence rates after ablation and data remain lacking regard…
View article: Novel Approaches for the Diagnosis of Concealed Nodo-Ventricular and His-Ventricular Pathways
Novel Approaches for the Diagnosis of Concealed Nodo-Ventricular and His-Ventricular Pathways Open
Background: Confirming the presence and participation of concealed nodo-ventricular (cNV) or concealed His-ventricular (cHV) pathways in tachyarrhythmias is challenging. We describe novel observations to aid in diagnosing cNV or cHV pathwa…
View article: Impact of Obesity on Catheter Ablation of Atrial fibrillation: Patient Characteristics, Procedural Complications, Outcomes and Quality of Life
Impact of Obesity on Catheter Ablation of Atrial fibrillation: Patient Characteristics, Procedural Complications, Outcomes and Quality of Life Open
Background Obesity is a well-known risk factor for atrial fibrillation (AF). Objective To evaluate the effect of baseline obesity on procedural complications, AF recurrence, and symptoms following catheter ablation (CA). Methods A total of…
View article: A case series of very slow atrioventricular nodal reentrant tachycardia resembling junctional tachycardia
A case series of very slow atrioventricular nodal reentrant tachycardia resembling junctional tachycardia Open
Introduction The surface electrocardiography of typical atrioventricular nodal reentrant tachycardia (AVNRT) shows simultaneous ventricular‐atrial (RP) activation with pseudo R′ in V1 and typical heart rates ranging from 150 to 220/min. Sl…
View article: A Case Series of Very Slow Atrioventricular Nodal Reentrant Tachycardia Resembling Junctional Tachycardia
A Case Series of Very Slow Atrioventricular Nodal Reentrant Tachycardia Resembling Junctional Tachycardia Open
Introduction: The surface EKG of typical atrioventricular nodal reentrant tachycardia (AVNRT) shows simultaneous ventricular-atrial (RP) activation with pseudo R’ in V1 and typical heart rates ranging from 150-220/min. Slower rates are sus…
View article: Early Experience with High-density Electroanatomical Mapping Using the Rhythmia™ Mapping System in Congenital and Pediatric Heart Disease
Early Experience with High-density Electroanatomical Mapping Using the Rhythmia™ Mapping System in Congenital and Pediatric Heart Disease Open
The Rhythmia™ system (Boston Scientific, Natick, MA, USA) facilitates the rapid acquisition of high-resolution electroanatomical and activation maps. However, there are limited data on its efficacy and safety in pediatric and adult congeni…
View article: Super and Nonresponders to Catheter Ablation for Atrial Fibrillation: A Quality-of-Life Assessment Using Patient Reported Outcomes
Super and Nonresponders to Catheter Ablation for Atrial Fibrillation: A Quality-of-Life Assessment Using Patient Reported Outcomes Open
Background: Atrial fibrillation (AF) ablation targets improvement in quality of life (QoL). Data is scarce on predictors of QoL improvement following ablation. We aimed to investigate the clinical characteristics underlying differential re…
View article: A case of junctional ectopic tachycardia with demonstration of both HA and HV dissociation during tachycardia
A case of junctional ectopic tachycardia with demonstration of both HA and HV dissociation during tachycardia Open
Junctional ectopic tachycardia (JET) is an unusual tachyarrhythmia most commonly encountered in infants and children.1 These are considered to have origins in the atrioventricular (AV) node or the upper His-Purkinje system (HPS). Langendor…
View article: Atrial fibrillation future clinic. Novel platform to integrate smart device electrocardiogram into clinical practice
Atrial fibrillation future clinic. Novel platform to integrate smart device electrocardiogram into clinical practice Open
Smartphone ECG with a cloud-based platform can be incorporated into the care of post-AF ablation patients without increasing anxiety and with less need for additional traditional monitors.
View article: Machine Learning–Derived Fractal Features of Shape and Texture of the Left Atrium and Pulmonary Veins From Cardiac Computed Tomography Scans Are Associated With Risk of Recurrence of Atrial Fibrillation Postablation
Machine Learning–Derived Fractal Features of Shape and Texture of the Left Atrium and Pulmonary Veins From Cardiac Computed Tomography Scans Are Associated With Risk of Recurrence of Atrial Fibrillation Postablation Open
Background: We hypothesized that computerized morphological analysis of the left atrium (LA) and pulmonary veins (PVs) via fractal measurements of shape and texture features of the LA myocardial wall could predict atrial fibrillation (AF) …
View article: Analysis of cardiac motion without respiratory motion for cardiac stereotactic body radiation therapy
Analysis of cardiac motion without respiratory motion for cardiac stereotactic body radiation therapy Open
Purpose/objective(s) To study the heart motion using cardiac gated computed tomographies (CGCT) to provide guidance on treatment planning margins during cardiac stereotactic body radiation therapy (SBRT). Materials/methods Ten patients wer…
View article: Ablation of Atrial Fibrillation Without Left Atrial Appendage Imaging in Patients Treated With Direct Oral Anticoagulants
Ablation of Atrial Fibrillation Without Left Atrial Appendage Imaging in Patients Treated With Direct Oral Anticoagulants Open
Background: Many centers continue to routinely perform transesophageal echocardiograms before atrial fibrillation (AF) ablation procedures in patients treated with direct oral anticoagulants (DOACs). One study suggested that the procedures…
View article: Ventricular premature pacing to reveal slow pathway conduction: A case of dual ventricular response with ventriculoatrial block
Ventricular premature pacing to reveal slow pathway conduction: A case of dual ventricular response with ventriculoatrial block Open
Dual atrioventricular (AV) nodal physiology is a common finding during electrophysiologic study forming the substrate for AV nodal reentrant tachycardia. In some circumstances, a sinus beat may result in dual ventricular response (DVR) owi…
View article: Catheter Ablation in Patients With Cardiogenic Shock and Refractory Ventricular Tachycardia
Catheter Ablation in Patients With Cardiogenic Shock and Refractory Ventricular Tachycardia Open
Background: There is paucity of data regarding radiofrequency ablation for ventricular tachycardia (VT) in patients with cardiogenic shock and concomitant VT refractory to antiarrhythmic drugs on mechanical support. Methods: Patients under…
View article: Utility of 18-Fluorodeoxyglucose positron emission tomography in the prediction of ventricular tachycardia and advanced conduction disease in patients with cardiac sarcoidosis
Utility of 18-Fluorodeoxyglucose positron emission tomography in the prediction of ventricular tachycardia and advanced conduction disease in patients with cardiac sarcoidosis Open
BackgroundThe diagnosis and management of cardiac sarcoidosis (CS) along with the recognition of high risk features remains a significant challenge.Failing to identify reliable disease prognosticators often results in fatal ventricular arr…
View article: Safety of Oral Dofetilide Reloading for Treatment of Atrial Arrhythmias
Safety of Oral Dofetilide Reloading for Treatment of Atrial Arrhythmias Open
Background: Although dofetilide labeling states that the drug must be initiated or reinitiated with continuous electrocardiographic monitoring and in the presence of trained personnel, the risks of dofetilide reloading justifying repeat ho…