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.

Tachycardia 52

Tachycardia Defibrillator Congenital Ischemia 52

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.

Electrophysiology 40

Electrophysiology Bicuspid/Mitral Tachycardia Ablation 40

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).

Aortic valve 40

Aortic valve Electrophysiology Tachycardia Aortic 40

HeartRhythm

MARCH 29, 2025

During atypical atrioventricular nodal reentrant tachycardia (AVNRT), the earliest atrial activation site following retrograde slow pathway (SP) conduction is at the atrial exit of the left inferior extension (LIE) in the coronary sinus (CS) or the right inferior extension (RIE) on the tricuspid annulus (TA).

Tachycardia 40

Tachycardia Electrophysiology Tricuspid 40

Journal of Cardiovascular Electrophysiology

JANUARY 17, 2025

ABSTRACT Atrial flutter (AFL), defined as macro-re-entrant atrial tachycardia, is associated with debilitating symptoms, stroke, heart failure, and increased mortality. Atypical AFL is a heterogenous group of re-entrant atrial tachycardias that most commonly occur in patients with prior heart surgery or catheter ablation.

Atrial Flutter 40

Atrial Flutter Electrophysiology Ablation Tachycardia 40

Journal of Cardiovascular Electrophysiology

NOVEMBER 18, 2024

Five criteria predict whether patients are likely or unlikely to have supraventricular tachycardia induced or ablated at an electrophysiologic study (EPS). They can be used as a guide for clinical decision making when considering invasive testing for patients with symptoms of tachycardia.

Tachycardia 45

Tachycardia Ablation Electrophysiology Article 45

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.

Electrophysiology 40

Electrophysiology Laboratory Article Tachycardia 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.

Electrophysiology 40

Electrophysiology Bicuspid/Mitral Anatomy Tachycardia 40

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?

Tachycardia 40

Tachycardia Electrophysiology Ablation Arrhythmia 40

All About Cardiovascular System and Disorders

FEBRUARY 5, 2024

Supraventricular tachycardia ECG

Tachycardia 52

Tachycardia Electrophysiology 52

HeartRhythm

APRIL 30, 2024

The implications of ES on electrophysiological characteristics are not well understood. Ablation in VT in patients with electrical storm (ES) is challenging and associated with increased peri-procedural morbidity and mortality.

Electrophysiology 40

Electrophysiology Ablation Tachycardia Outcomes 40

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.

Atrial Fibrillation 40

Atrial Fibrillation Tachycardia Ablation Electrophysiology 40

Journal of the American Heart Association

DECEMBER 8, 2023

Journal of the American Heart Association, Ahead of Print.

Ablation 45

Ablation Tachycardia Electrophysiology Outcomes 45

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.

Tachycardia 40

Tachycardia Electrophysiology Ablation 40

HeartRhythm

NOVEMBER 26, 2024

A 70-year-old male underwent an electrophysiologic (EP) study for episodic palpitations. Atrial extra stimulus testing induced a short- RP tachycardia initiated by prolongation of the AH interval. Baseline HV interval was 54 msec.

Tachycardia 40

Tachycardia Electrophysiology 40

Journal of Cardiovascular Electrophysiology

MARCH 25, 2025

ABSTRACT Introduction Atrial tachycardias (AT) originating from the distal left atrial appendage (LAAd) are rare and pose significant challenges during catheter ablation. Electrophysiological study and activation mapping were performed, revealing a focal AT originating from the LAAd with a cycle length of 544ms (110bpm).

Tachycardia 40

Tachycardia Ablation Electrophysiology 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.

Tachycardia 40

Tachycardia Electrophysiology Ablation 40

Circulation: Arrhythmia and Electrophysiology

DECEMBER 16, 2024

Circulation: Arrhythmia and Electrophysiology, Ahead of Print. Complex ventricular tachycardias involving the fascicular system (fascicular ventricular tachycardias [FVTs]) can be challenging. To summarize, 5 cases had prior ablation with 2 previously misdiagnosed as supraventricular tachycardia.

Tachycardia 40

Tachycardia Ablation Arrhythmia Electrophysiology 40

HeartRhythm

APRIL 30, 2024

Entrainment of ventricular tachycardia (VT) can be challenging as induction can lead to instability. Epicardial pace mapping has been described with multipolar coronary sinus (CS) catheters during electrophysiological studies, but not with a cardiac resynchronisation therapy (CRT) lead.

Tachycardia 40

Tachycardia Electrophysiology 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.

Tachycardia 40

Tachycardia Tricuspid Electrophysiology Document 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.

Tachycardia 40

Tachycardia Electrophysiology Physiology Ablation 40

HeartRhythm

APRIL 9, 2025

Atrioventricular nodal reentry tachycardia (AVNRT), identified as the most prevalent form of regular tachycardia in humans,3 exhibits a strong relationship with the anatomy and physiology of the AV node (AVN) and junction. Despite the temporal distance, Koch's triangle and pyramid remain a repository of unresolved mysteries.

Electrophysiology 40

Electrophysiology Anatomy Tachycardia Physiology 40

Circulation: Arrhythmia and Electrophysiology

FEBRUARY 28, 2024

Circulation: Arrhythmia and Electrophysiology, Ahead of Print. During early childhood, 50% of patients develop multifocal atrial tachycardia, a treatment-resistant tachyarrhythmia of unknown pathogenesis. BACKGROUND:GermlineHRASgain-of-function pathogenic variants cause Costello syndrome (CS).

Tachycardia 40

Tachycardia Pacemaker Electrophysiology Arrhythmia 40

Journal of Cardiovascular Electrophysiology

JANUARY 13, 2025

Studies have shown that mutations in the RYR2 gene, which encodes the RyR2 protein, are linked to several cardiac arrhythmias, including catecholaminergic polymorphic ventricular tachycardia (CPVT), long QT syndrome (LQTS), calcium release deficiency syndrome (CRDS), and atrial fibrillation (AF).

Congenital Heart Disease 40

Congenital Heart Disease Electrophysiology Congenital Heart Disease 40

HeartRhythm

APRIL 30, 2024

Managing scar-related ventricular tachycardia (VT) demands a nuanced understanding of the interplay between structural damage and electrophysiological function.

Tachycardia 40

Tachycardia Electrophysiology 40

HeartRhythm

MARCH 12, 2024

The patient was taken up for electrophysiology study during which a narrow complex tachycardia was induced which subsequently transformed into wide QRS tachycardia. What is the mechanism of the tachycardia? The 12 lead ECG (figure 1) and intracardiac recordings (figure 2) are shown below.

Tachycardia 40

Tachycardia Electrophysiology Arrhythmia Hospital 40

HeartRhythm

MARCH 26, 2024

Anatomical and electrophysiological findings suggest the actual circuit of atrioventricular nodal reentrant tachycardia (AVNRT) involves the perinodal atrium. However, occasional instances where the atrium is dissociated from AVNRT have led to the concept of upper common pathways (UCP).

Tachycardia 40

Tachycardia Electrophysiology 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.

Tachycardia 40

Tachycardia Electrophysiology Arrhythmia Cardiomyopathy 40

Frontiers in Cardiovascular Medicine

JANUARY 8, 2025

IntroductionFocal atrial tachycardia (FAT) is predominant in the pediatric population. A 12-lead electrocardiogram revealed a narrow QRS complex tachycardia with a rate of 157 beats per minute and a prolonged RP relationship. Echocardiography indicated a severely reduced ejection fraction of 22%.

Tachycardia 40

Tachycardia Ablation Cardiomyopathy Electrocardiogram 40

HeartRhythm

APRIL 30, 2024

Pulsed-field ablation (PFA) is becoming increasingly relevant in the field of electrophysiology. Data on the use is sparse, especially for atrial tachycardia (AT). Besides single-shot PFA devices for pulmonary vein isolation (PVI), point-by-point PFA is also gaining importance due to many possible applications.

Tachycardia 40

Tachycardia Ablation Electrophysiology Technology 40

Journal of Cardiovascular Electrophysiology

JANUARY 13, 2025

ABSTRACT We encountered a single case in which a transition between orthodromic reciprocating tachycardia with a concealed nodoventricular pathway and atrioventricular nodal reentrant tachycardia with a bystander nodoventricular pathway was observed.

Tachycardia 40

Tachycardia 40

HeartRhythm

NOVEMBER 19, 2023

A 68 year-old man underwent diagnostic electrophysiologic study because of a symptomatic short RP supraventricular tachycardia (SVT). Transthoracic echocardiography was normal. Atrio-His (AH) and His-ventricular intervals measured 70ms and 55ms, respectively.

Tachycardia 40

Tachycardia Electrophysiology Physiology 40

Circulation: Arrhythmia and Electrophysiology

SEPTEMBER 25, 2024

Circulation: Arrhythmia and Electrophysiology, Ahead of Print.

Ablation 40

Ablation Tachycardia Electrophysiology Arrhythmia 40

Frontiers in Cardiovascular Medicine

MARCH 4, 2024

Torsades de Pointes (TdP) refers to a polymorphic ventricular tachycardia (VT) with undulating QRS axis that occurs in long QT syndrome (LQTS), although the term has been used to describe polymorphic ventricular tachyarrhythmias in which QT intervals are not prolonged, such as short-coupled variant of TdP currently known as short-coupled ventricular (..)

Electrophysiology 93

Electrophysiology Tachycardia Research 93

Dr. Smith's ECG Blog

DECEMBER 13, 2024

The 2019 ESC Guidelines for the management of patients with supraventricular tachycardia indicated that IV Amiodarone should not be considered in these populations. This electrophysiological property is called decremental conduction. More cases on WPW with atrial fibrillation : A young man with another episode of tachycardia.

AFIB 103

AFIB Atrial Fibrillation Tachycardia Blog 103

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. The mean SR cycle length (CL) was 784.1 ± 6 ms and the mean tachycardia CL was 361.2 ± 54 ms.

Tachycardia 40

Tachycardia Ablation Electrophysiology Arrhythmia 40

HeartRhythm

MAY 15, 2024

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 In the past decade, major advances were made in catheter ablation for arrhythmias and implantation of cardiac implantable electronic devices.1

Electrophysiology 40

Electrophysiology Atrial Fibrillation Ablation Arrhythmia 40