This issue of Cardiac Electrophysiology Clinics, guest edited by Mohammad Shenasa and Amin Al-Ahmad, is the second part of ourAdvances in Cardiac Mapping and Catheter Ablation issue. Article topics will include, but are not limited to,New Findings in Atrial Fibrillation Mechanisms; Mapping and Ablation of Neuraxial in Patients with Ventricular Arrhythmias; How to Map and Ablate Rotors in Atrial Fibrillation; Post-ablation Atrial Arrhythmias; Substrate Mapping in Atrial Arrhythmias; Substrate Mapping in Ventricular Arrhythmias; Challenges in Ablation of Complex Congenital Heart Disease; Mapping and Ablation of Ventricular Arrhythmias from the RV and LV Outflow Tract; Novel Insights on Idiopathic VF and Early Repolarization; Novel Observations in Mapping and Ablation in Brugada Syndrome; Ablations of Ventricular Arrhythmias; Mapping and Ablation of Arrhythmias from uncommon sites; Mapping and Ablation of VT in Patients with HF and Cardiomyopathies; Mapping and Ablation of Unmappable VT, VT Storm, and Those in Acute Myocardial Infarction; Mapping and Ablation of Ventricle Arrhythmia in patients of LVAD; Fluoroless Catheter Ablation of Cardiac Arrhythmias; Toward a Uniform Ablation Protocol for Paroxysmal; Persistent and Permanent AF; and The Ideal Mapping System.

This issue of Cardiac Electrophysiology Clinics, guest edited by Mohammad Shenasa and Amin Al-Ahmad, will focus on Advances in Cardiac Mapping and Catheter Ablation. This is part one of a two-part issue and will include articles centered around Basic Concepts in Cardiac Mapping, Novel Mapping & Imaging Systems & Technologies, and Catheter and Energy Sources. Topics include, but are not limited to, Embryology of the Cardiac Conduction System Relevant to Cardiac Arrhythmias; Anatomical Consideration Relevant to Atrial and Ventricular Arrhythmias; Fundamentals of Cardiac Mapping; Novel Cardiac Mapping Systems; Non-invasive Mapping & ECGI in Atrial and Ventricular Arrhythmias; Optical Mapping; Omnipolar Mapping; Cardiac CT, MRI, and Fibrosis Quantification; High resolution mapping in patients with atrial and ventricular arrhythmias; Contact Force and Ablation Index; and New Catheter Balloons Including Radiofrequency.

In collaboration with the Consulting Editors, Ranjan K. Thakur and Andrea Natale, Drs. Luigi Di Biase, Frank Marchlinski, and Andrea Natale have assembled an issue of Cardiac Electrophysiology Clinics on Advances in Atrial Fibrillation Ablation. Topics include, but are not limited to, Recurrent atrial fibrillation with isolated PVs, Beyond PVI in non paroxysmal atrial fibrillation, Recurrent atrial fibrillation after cryo, Recurrent atrial fibrillation after RF, high-density mapping, Expectation and Results of surrogate target beyond PVI, Lessons from epicardial mapping and ablation in refractory atrial fibrillation, Evolution of radiofrequency ablation parameters, Balloon based technologies, Energy sources, Current status of esophageal protection, Fluoroless atrial fibrillation ablation, Role of MRI imaging before and after ablation, When to stop OAC after atrial fibrillation ablation, Atrial fibrillation ablation trials, Risk Factor modification before and after atrial fibrillation ablation.

This issue of Cardiac Electrophysiology Clinics, Guest Edited by Giuseppe Bagliani, Roberto De Ponti, and Fabio Leonelli, will focus on Interpreting Complex Arrhythmias. Topics include, but are not limited to: Simple and complex Arrhythmias; Standard ECG recording; Advanced cardiac signal recording; P and QRS in arrhythmias: identification, analysis and relationship; The comparative value of basic and arrhythmia ECG in the interpretation of arrhythmic mechanism; Challenges in Bradycardias interpretation; Challenges in Narrow QRS tachycardia interpretation; Challenging cases of Wide complex tachycardias; QRS variations during arrhythmia: mechanisms and substrates; Polymorphic ventricular tachycardia: differential diagnosis; Arrhythmias due to acquired or inherited abnormalities of Ventricular repolarization; Arrhythmias in patients with implantable devices; Complex arrhythmias due to reversible causes; and Hidden complexities in routine adult and paediatric arrhythmias interpretation.

In collaboration with the Consulting Editors, Ranjan K. Thakur and Andrea Natale, Drs. Dhanunjaya Lakkireddy, David R. Holmes Jr., and Saibal Kar have assembled an issue of Cardiac Electrophysiology Clinics on Left Atrial Appendage. Topics include, but are not limited to, why we have an atrial appendage, thromboembolism in AF, role of LAA in systemic homeostasis, history of LAA closure, impact of LAA closure on systemic thromboembolization, perirprocedural imaging, anatomical considerations for epicardial and endocardial appendage closure, epicardial vs endocardial closure, technical considerations of endocardial and epicardial closure, surgical LAA occlusion, post procedural management, AF patients undergoing ablation, and more.

This issue of Cardiac Electrophysiology Clinics, Guest Edited by Dr. Jagmeet P. Singh and Dr. Gopi Dandamudi, focuses on Cardiac Resynchronization. Topics include--but are not limited to--The many faces of heart failure, Economic impact of chronic HF management in today’s cost-conscious environment, Contemporary treatment of HF, Why dyssynchrony matters in HF, Utility of echocardiography in assessing dyssynchrony, Cardiac Magnetic Resonance Imaging as a tool to assess dyssynchrony, Current clinical evidence favoring CRT & When to implant CRT in HF patients, How to implant CRT devices in a busy clinical practice, Tips and tricks for challenging implants, Explanting chronic CS leads, Optimizing CRT devices in follow-up to improve response rates and outcomes, Increasing role of remote monitoring of CRT devices in improving outcomes, CRT in preserved to mildly reduced systolic function, Role of AVJ ablation and CRT in patients with chronic AF, Gender based differences in CRT response, Benefits of multisite/multipoint pacing to improve CRT response, LV endocardial pacing/leadless pacing, and Evolving role of permanent His bundle pacing in conquering dyssynchrony.

This issue of Cardiac Electrophysiology Clinics, Guest Edited by Drs. Jason Bradfield and Kalyanam Shivkumar, is dedicated to Epicardial Interventions in Electrophysiology. This is one of four issues selected each year by the series Consulting Editors, Ranjan K. Thakur and Andrea Natale. Topics include, but are not limited to, Anatomy of the Pericardial Space, Techniques for Percutaneous Access, Peri-operative Imaging to Guide Epicardial Mapping and Ablation, Epicardial Ablation of Idiopathic Ventricular Tachycardia, Epicardial Ablation of Ischemic Ventricular Tachycardia, Epicardial Ablation of Non-ischemic Ventricular Tachycardia, Epicardial Ablation of Arrhythmogenic Right Ventricular Cardiomyopathy, Epicardial Ablation of Ventricular Arrhythmia secondary to Brugada Syndrome, Epicardial Ablation of Supraventricular Tachycardia, Epicardial Ablation of Atrial Fibrillation, Hybrid Surgical Epicardial Ablation, Epicardial Ablation via the Arterial and Venous System, Epicardial Ablation Biophysics and novel Radiofrequency Energy Delivery Techniques, Epicardial Ablation Complications, and The Future of Epicardial Interventions.