Pharmacological options for rate control in atrial fibrillation are scarce. Ivabradine was postulated to reduce the ventricular rate in this setting.

The impact of left bundle branch area pacing (LBBAP) on right ventricular (RV) function and tricuspid regurgitation (TR) remains unclear.

Conduction system pacing (CSP) has emerged as a promising alternative to biventricular pacing (BVP) in patients with heart failure with reduced ejection fraction (HFrEF) and ventricular dyssynchrony,...

The benefit of catheter ablation for atrial fibrillation (AF) in patients with heart failure with preserved ejection fraction (HFpEF) remains uncertain.

Idiopathic ventricular fibrillation (IVF) is a complex and heterogeneous clinical entity.1 In a significant proportion of patients, short-coupled ventricular ectopy can be documented,2 the majority...

While early precordial electrocardiographic (ECG) characteristics are useful to differentiate left-sided from the right-sided outflow tract ventricular arrhythmia (OTVA), few patterns predict an...

The classical paradigm of scar-related reentrant ventricular tachycardia (VT) features a circuit with a double loop figure-of-eight (F8) activation pattern.

Establishing the precise mechanism of cardiac arrhythmias in the electrophysiology laboratory is one of the main requisites for a successful and safe ablation. This article provides an organized...

There are little data on ventricular arrhythmias (VAs) originating from the right bundle branch (RBB) of the moderator band (MB) (MB-RBB VAs) in a cohort of patients.

Beginning in the mid-1970s, surgical ablation of accessory atrioventricular (AV) pathways (APs) was performed at a limited number of centers. The potential to target APs by catheter ablation became...

It is unknown whether cardiac resynchronization therapy (CRT) would improve or halt the progression of heart failure (HF) in patients with mild to moderately reduced ejection fraction (HFmmrEF) and...

A 68-year-old man underwent a diagnostic electrophysiology study because of a symptomatic short RP supraventricular tachycardia (SVT). Transthoracic echocardiography was normal. Atrio-His and...

Congenital long QT syndrome (LQTS) is a hereditary cardiac channelopathy with an estimated prevalence of 1 in 2500. A prolonged resting QT interval corrected for heart rate (QTc interval) remains a...

The optimal duration of atrial fibrillation (AF) persistence for predicting poor outcomes after catheter ablation of long-standing AF (LsAF) and the best ablation strategy for these patients remain...

Current annotation of local fractionated signals during ventricular electroanatomic mapping (EAM) requires manual input subject to variability and error.

Pulsed field ablation (PFA) and very high-power short-duration (vHPSD) radiofrequency ablation are the most recently introduced technologies for atrial fibrillation (AF) ablation. The procedural...

Pulsed-field ablation (PFA) has shown promising data in terms of safety and procedural efficiency for pulmonary vein isolation (PVI), with similar long-term outcomes compared to radiofrequency...

His-bundle pacing (HBP) and left bundle pacing (LBP) are emerging as novel delivery methods for cardiac resynchronization therapy (CRT) in heart failure patients with left bundle branch block (LBBB)....

Three potential cellular mechanisms for premature ventricular contractions (PVCs) are automaticity, triggered activity, and reentry.1 Outflow tract PVCs are the most prevalent and have been shown to...

For practical reasons, the right atrial appendage (RAA) has remained the preferred site for atrial lead implantation since the introduction of atrial pacing nearly 50 years ago.1 The RAA is easy to...

A rotational activation pattern (RAP) around the localized line of a conduction block often correlates with sites specific to the critical zones of ventricular tachycardia (VT). The wavefront...

Left bundle branch area pacing (LBBAP) has been increasingly adopted as an alternative modality to cardiac resynchronization therapy (CRT). The feasibility and safety of using an LBBAP lead to...

Three potential cellular mechanisms for premature ventricular contractions (PVCs) are automaticity, triggered activity, and reentry.1 Outflow tract PVCs are the most prevalent and have been shown to...

Congenital long QT syndrome (LQTS) is a hereditary cardiac channelopathy with an estimated prevalence of 1 in 2500. A prolonged resting QT interval corrected for heart rate (QTc interval) remains a...

Left bundle branch pacing (LBBP) provides electrical and mechanical synchrony at low stable thresholds. A left bundle branch (LBB) potential can be demonstrated in all patients with normal anterogr...

There is an extraordinary and increasing global burden of atrial fibrillation (AF) and obstructive sleep apnea (OSA), two conditions that frequently accompany one another and that share underlying...

Left bundle branch pacing (LBBP) and left ventricular septal pacing (LVSP) are referred to as left bundle branch area pacing.

Ventricular premature depolarizations (VPDs) originating from the mid interventricular septum (IVS) adjacent to the atrioventricular annulus between the His bundle and the coronary sinus ostium (mid...

Early repolarization syndrome (ERS) is an idiopathic ventricular fibrillation (VF) associated with inferolateral J waves. While electrical storm (ES) in ERS is not rare, their characteristics and...

The benefit of an anterior mitral line (AML) in patients with persistent atrial fibrillation (AF) and anterior atrial scar undergoing ablation has never been investigated.

A 70-year-old woman with a history of ischemic cardiomyopathy and ejection fraction of 20% due to a large healed anteroapical infarction presented with palpitations and shortness of breath. She had...

The optimal technique for venous access (VA) in cardiac implantable electronic device (CIED) implant procedures is unclear.1 Ultrasound (US)–guided axillary VA has been established as a safe,...

His-refractory premature ventricular complexes perturbing a supraventricular tachycardia (SVT) establish the presence of an accessory pathway (AP). Earlier premature ventricular complexes (ErPVCs)...

Left bundle branch area pacing (LBBAP) has swiftly emerged as a safe and effective alternative to right ventricular pacing. Limited data exist on the use of retractable-helix, stylet-driven leads for...

Conduction system pacing (CSP) by His bundle pacing or left bundle branch area pacing (LBBAP) is incorporated into Heart Rhythm Society guidelines for the management of bradycardia and cardiac...

A 68-year-old man underwent a diagnostic electrophysiology study because of a symptomatic short RP supraventricular tachycardia (SVT). Transthoracic echocardiography was normal. Atrio-His and...

Left bundle branch pacing (LBBP) provides a low and stable threshold by direct capture of left bundle fibers on the left ventricular subendocardium. As the procedure involves the deployment of the...

Atrial cardiomyopathy is known as an underlying pathophysiological factor in the majority of patients with atrial fibrillation (AF). Left atrial low-voltage areas (LVAs) are reported to coincide with...

High-frequency, low tidal volume (HFLTV) ventilation increases the efficacy and efficiency of radiofrequency catheter ablation (RFCA) of paroxysmal atrial fibrillation. Whether those benefits can be...

The slow pathway potential is difficult to annotate because it is buried within the atrial potential. Omnipolar technology near field can automatically annotate the peak frequency potential associa...

The Purkinje network plays an important role in the occurrence and maintenance of ventricular fibrillation (VF) in patients with structural heart disease and idiopathic VF. Recently, the involvement...

During left bundle branch (LBB) area pacing, it is important to confirm that capture of the LBB, and not just capture of only adjacent left ventricular (LV) myocardium, has been achieved.

His-bundle pacing (HBP) and left bundle pacing (LBP) are emerging as novel delivery methods for cardiac resynchronization therapy (CRT) in heart failure patients with left bundle branch block (LBBB)....

Cardioneuroablation (CNA) is a promising therapy for reflex asystolic syncope; however, convincing data on the mid-term safety and efficacy of this procedure are lacking.

Despite growing clinical use of left bundle branch pacing (LBBP), data regarding the fundamentals of this pacing modality, including chronaxie and rheobase, are scarce.

Catheter ablation of atrial fibrillation (AF) is an established therapy that reduces AF burden, improves quality of life, and reduces the risks of cardiovascular outcomes. Although there are clear...

After a long journey through different journals with the same reviewers rejecting our paper, Mel Scheinman, by then Associate Editor of the Journal of the American College of Cardiology, took...

Anatomic and electrophysiologic findings suggest that the actual circuit of atrioventricular nodal reentrant tachycardia (AVNRT) involves the perinodal atrium. However, occasional instances in which...