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Ablation Electrophysiology Tachycardia 
HeartRhythm
AUGUST 27, 2024
Epicardial Marshall bundle (MB) are frequently utilized in left atrial tachycardias (LATs) post atrial fibrillation (AF) ablation with pulmonary vein isolation and substrate modification.
HeartRhythm
APRIL 30, 2024
There is limited data regarding safety, electrophysiologic characteristics and arrhythmia substrate during ventricular tachycardia (VT) ablation in patients with prior aortic valve replacement (AVR).
40 
HeartRhythm
APRIL 5, 2024
The aorta-mitral annulus conjunction (AMC) is uncommon site of origin of focal atrial tachycardias (AT). Hence, the electrophysiological and ablation target characteristics are poorly described.
HeartRhythm
APRIL 30, 2024
Ablation in VT in patients with electrical storm (ES) is challenging and associated with increased peri-procedural morbidity and mortality. The implications of ES on electrophysiological characteristics are not well understood.
Journal of the American Heart Association
DECEMBER 8, 2023
Twenty‐six PVT/ventricular fibrillation–triggering PVCs were identified for ablation. After a mean follow‐up of 49 months after ablation, 8 (57%) patients were free from syncope recurrence. Ablation of trigger beat significantly reduced the syncope frequency (mean±SD, 4.3±1.6
45 
Frontiers in Cardiovascular Medicine
JANUARY 10, 2024
However, widely split P' waves in focal atrial tachycardia (AT) on a surface electrocardiogram (ECG) have rarely been reported. The electrophysiological mechanism is relatively difficult to clarify, requiring a electrophysiological study. P' waves were markedly prolonged in duration and widely split in morphology.
59 
HeartRhythm
MAY 8, 2024
Establishing the precise mechanism of cardiac arrhythmias in the electrophysiology laboratory is one of the main requisites for a successful and safe ablation.
HeartRhythm
APRIL 8, 2024
Different types of recurrent atrial tachycardias (ATs) following Cox-Maze procedures have been reported, while biatrial tachycardia (BiAT) have not been systematically analyzed.
40 
All About Cardiovascular System and Disorders
APRIL 17, 2024
Ventricular tachycardia is a potentially life threatening cardiac arrhythmia. On the ECG, ventricular tachycardia can be defined as three or more ventricular ectopic beats occurring in a sequence at a rate more than 100 per minute. Another rare form of ventricular tachycardia is bidirectional ventricular tachycardia.
52 
HeartRhythm
JUNE 27, 2024
The patient had undergone an electrophysiology study and radiofrequency ablation elsewhere and was subsequently referred to our centre. We found a narrow complex tachycardia of cycle 460 ms length ms which was repeatedly induced with atrial extrastimuli. What is the mechanism of the tachycardia?
40 
Journal of Cardiovascular Electrophysiology
AUGUST 26, 2024
Abstract Introduction Due to its unique features, pulsed field ablation (PFA) could potentially overcome some limitations of current radiofrequency (RF) ventricular tachycardia (VT) ablation. Methods Two patients with ischemic cardiomyopathy and previously failed RF VT ablations were treated with PFA.
40 
HeartRhythm
APRIL 30, 2024
Hence, the electrophysiological and ablation target characteristics are poorly described. Focal AT at the aorta-mitral annulus conjunction (AMC) is uncommon.
Journal of Cardiovascular Electrophysiology
SEPTEMBER 16, 2024
Abstract Introduction Understanding the spatiotemporal location of the spontaneous termination of ventricular tachycardia (VT) may provide new insights for ablation. These findings may help guide future studies into improving the success of VT ablation.
40 
HeartRhythm
APRIL 30, 2024
Very slow atrioventricular node reentry tachycardia (AVNRT) could compete with sinus rhythm giving the appearance of a non-reentrant accelerated junctional rhythm (AJR). Clinical awareness of very slow AVNRT masquerading as AJR is important because the former can be ablated with high success and low complications.
40 
Journal of Cardiovascular Electrophysiology
JULY 24, 2024
Abstract Introduction Catheter-based radiofrequency (RF) ablation is generally regarded as the standard approach for patients with ventricular tachycardia (VT) refractory to antiarrhythmic drug therapy and may be considered as a first-line approach when there is a preference to avoid these agents.
40 HeartRhythm
APRIL 5, 2024
A 28-year-old man with recurrent palpitations and no structural heart disease presented with a documented wide QRS complex tachycardia (WCT). He had a history of slow pathway ablation for atrioventricular nodal reentrant tachycardia three months ago.
40 
Circulation: Arrhythmia and Electrophysiology
JUNE 5, 2024
Circulation: Arrhythmia and Electrophysiology, Ahead of Print. BACKGROUND:Epicardial approach in ventricular tachycardia (VT) ablation is still regarded as a second-step strategy, due to the risk of complications. The epicardial approach was considered useful if epicardial ablation was performed after epicardial mapping.
40 
HeartRhythm
APRIL 30, 2024
Ventricular tachycardia (VT) ablation in structural heart disease improves arrhythmia free survival. Procedural factors that influence these outcomes are not well described.
40 
HeartRhythm
JUNE 12, 2024
A 50-year-old woman was referred to our hospital for catheter ablation of a regular narrow QRS tachycardia with a short RP interval. In an electrophysiological study, the baseline atrio-His (AH) and His-ventricular intervals were normal. No retrograde dual atrioventricular (AV) nodal physiology was observed.
40 
Journal of Cardiothoracic Surgery
APRIL 1, 2024
Atrial tachycardia (AT) originating from the left atrial appendage (LAA) is uncommon and the most difficult arrhythmia to eliminate. Therefore, we present the case of a 5-year-old girl with tachycardia-induced.
40 
HeartRhythm
MAY 15, 2024
In the past decade, major advances were made in catheter ablation for arrhythmias and implantation of cardiac implantable electronic devices.1 1 Catheter ablation for atrial fibrillation (AF) and ventricular tachycardia (VT) has become the standard of care for many patients presenting with these arrhythmias.2–4
Journal of Cardiovascular Electrophysiology
MARCH 10, 2024
Graphical abstract summurized four step of AVNRT ablation. Abstract Introduction Mapping system is useful in ablation of atrioventricular nodal reentry tachycardia (AVNRT) and localization of anatomic variances. There was a significant correlation between LVB, CP, and the site of effective ablation ( p = .001).
40 Journal of Cardiovascular Electrophysiology
JULY 16, 2024
Catheter ablation can be a life-saving procedure in some patients with recurrent drug-refractory ventricular arrhythmias. Methods and Results A patient with three prior ablations targeting two different monomorphic ventricular tachycardias (MMVTs) presented with recurrent ventricular tachycardia (VT).
40 
DAIC
DECEMBER 29, 2023
Outcomes of ablation with the FARAPULSE PFA System – a nonthermal treatment in which electric fields selectively ablate heart tissue – will be compared to outcomes following use of anti-arrhythmic drug (AAD) therapy, which is commonly prescribed for patients living with persistent AF. The company now anticipates U.S. Circulation.
Journal of Cardiovascular Electrophysiology
JANUARY 7, 2024
Abstract Background The mechanism of typical slow-fast atrioventricular nodal re-entrant tachycardia (AVNRT) and its anatomical and electrophysiological circuit inside the right atrium (RA) and Koch's Triangle (KT) are not well known. Results Forty-five consecutive cases of successful ablation of typical slow-fast AVNRT were included.
40 
HeartRhythm
APRIL 30, 2024
Adenosine has long been used in the management of supraventricular tachycardia as well as within the EP lab, both to unmask hidden conduction pathways as well as for confirmation of elimination of accessory pathways post-ablation.
HeartRhythm
APRIL 30, 2024
The clinical and electrophysiological (EP) characteristics of these PVCs are important to recognize given risk of injury to the conduction system. Premature ventricular contractions (PVCs) not uncommonly originate from the Para Hisian (PH) region.
Journal of Cardiovascular Electrophysiology
JANUARY 28, 2024
Abstract Introduction Some previous studies have reported that a first-step ethanol infusion into the vein of Marshall (EIVOM) with touch-up radiofrequency (RF) ablation can facilitate mitral isthmus (MI) block and improves the ablation outcomes in persistent atrial fibrillation (PeAF) patients. 0.78, p = .006).
Dr. Smith's ECG Blog
JUNE 11, 2023
The ECGs show a wide complex, irregularly irregular tachycardia. The therapeutic and diagnostic cardiac electrophysiological uses of adenosine We can again see shortening of the PR interval and widening of the QRS complex with delta waves. An accessory pathway was identified and was ablated.
87 Circulation: Arrhythmia and Electrophysiology
DECEMBER 21, 2023
Circulation: Arrhythmia and Electrophysiology, Ahead of Print. BACKGROUND:Inflammation may promote atrial fibrillation (AF) recurrence after catheter ablation. The first dose of the study drug was administered within 4 hours before ablation. 1.61];P=0.92) or at 3 months following ablation (14% versus 15%; HR, 0.95 [95% CI, 0.45–2.02];P=0.89).
HeartRhythm
APRIL 30, 2024
The study of ventriculoatrial (VA) conduction during an electrophysiological (EP) study is crucial for ablating supraventricular tachycardias (SVT) and WPW, particularly with suspected accessory pathways or AV nodal reentry tachycardia.
40 Journal of Cardiovascular Electrophysiology
DECEMBER 7, 2023
Abstract Background and Aims Ablation of anteroseptal accessory pathways (AS-AP) is challenging, with lower success and more complications compared to other APs. AS-APs can be successfully ablated from the right atrium (RA) or the aortic valve's noncoronary cusp (NCC).
Journal of Cardiovascular Electrophysiology
DECEMBER 10, 2023
The activation signal, or signature, defined as the cumulative number of recording sites that have activated per millisecond, was utilized to segment each re-entrant ventricular tachycardia (VT) circuit into inner and outer circuit pathways, and as an estimate of best ablation lesion location to prevent VT. sites activating/ms).
40 
DAIC
MARCH 5, 2024
a global leader in cardiac arrhythmia treatment and part of Johnson & Johnson MedTech , today announced European CE mark approval of the VARIPULSE Platform for the treatment of symptomatic drug refractory recurrent paroxysmal atrial fibrillation ( AF ) using pulsed field ablation (PFA). iii] The study reported a low fluoroscopy time of 7.8
59 
HeartRhythm
JANUARY 19, 2024
ECG documentation of atrioventricular-nodal re-entrant tachycardia (AVNRT) in patients with paroxysmal tachycardia is not always feasible. Even in patients with documented paroxysmal supraventricular tachycardia (SVT), there are chances that sustained AVNRT will not be induced during electrophysiological study (EPS).
40 Journal of Cardiovascular Electrophysiology
DECEMBER 7, 2023
FAAM ablation successfully decreased the recurrence rate of atrial tachyarrhythmia compared with conventional non-PV foci ablation. FAAM ablation has the potential to decrease the recurrence rate of atrial tachyarrhythmia in patients with recurrent AF. The RHYTHMIA system was used to perform all the procedures.
40 
Journal of Cardiovascular Electrophysiology
DECEMBER 3, 2023
Methods and Results This case report discusses a 65-year-old man who had previously undergone pulmonary vein isolation (PVI) and cavo-tricuspid isthmus ablation for atrial fibrillation before ASD closure, respectively. He developed atrial tachycardia (AT) and underwent catheter ablation.
Journal of Cardiovascular Electrophysiology
MARCH 4, 2024
ECG data during the clinical arrhythmia (ventricular tachycardia [VT], upper left figure) is analyzed with an artificial intelligence algorithm which identifies a probable location of the source of the arrhythmia (left ventricular anterolateral papillary muscle, lower left figure). Use of the system was associated with a 19.0% vs. 33.2 ± 18.0
40 
HeartRhythm
MARCH 12, 2024
A 37-year-old woman with biventricular repair for pulmonary atresia and an intact ventricular septum was referred for an electrophysiological study in the context of recurrent atrial arrhythmias with multiple electrical cardioversions. Her clinical tachycardia was easily inducible and had a cycle length (TCL) of 340 ms.
Journal of Cardiovascular Electrophysiology
JANUARY 15, 2024
Case A 47-year-old male presented with atrial tachycardia 6 months post heart transplant. Electrophysiologic study demonstrated atrial fibrillation originating from native heart and propagated through atrio-atrial connections to the donor heart. This arrhythmia was successfully terminated with radiofrequency ablation.
Journal of Cardiovascular Electrophysiology
DECEMBER 7, 2023
Methods and Results A 27-year-old male with Ebstein's anomaly and manifest WPW syndrome received catheter ablation twice. The first electrophysiology study (EPS) induced orthodromic atrioventricular reentrant tachycardia and successfully eliminated the posteroseptal accessory pathway (AP).
Journal of Cardiovascular Electrophysiology
JANUARY 4, 2024
Abstract Introduction Dual atrioventricular nodal non-reentrant tachycardia (DAVNNT) is a rare and challenging-to-diagnose arrhythmia, without previous reports associating it with a leftward inferior extension (LIE). Methods Diagnosis was made using adenosine triphosphate (ATP) injection during atrial pacing in a suspected DAVNNT patient.
40 Journal of Cardiovascular Electrophysiology
JANUARY 10, 2024
Abstract Introduction Despite advanced ablation strategies and major technological improvements, treatment of persistent atrial fibrillation (AF) remains challenging and the underlying pathophysiology is not fully understood. ms after) and AF termination to atrial tachycardia (AT) or sinus rhythm (SR) in 12 patients (24%).
Journal of Cardiovascular Electrophysiology
JANUARY 5, 2024
Abstract Introduction It would be helpful in determining ablation strategy if the occurrence of perimitral atrial tachycardia (PMAT) could be predicted in advance. Conclusion Short E-PMCT may predict noninducibility of PMAT and guide a less invasive ablation strategy.
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