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Distribution Variance of Focal Atrial Tachycardia Foci and Long-Term Outcomes After Ablation. ABSTRACT Introduction The distribution of the origin of focal atrial tachycardia (FAT) in patients with different ages have not been clearly elucidated. After a mean follow-up of 47.2 months, FAT recurred in 57 patients.
She had a single chamber ICD/Pacemaker implanted several years prior due to ventricular tachycardia. Answer : The ECG above shows a regular wide complex tachycardia. Said differently, the ECG shows a rather slow ventricular tachycardia with a 2:1 VA conduction. Cardiac output (CO) was being maintained by the tachycardia.
Using ECG recording and deductive reasoning, our teachers and predecessors classified the bradycardias and tachycardias and proposed many mechanisms, subsequently proven to be correct. Notwithstanding many insightful observations, the electrocardiogram (ECG) arguably ignited the big bang in our understanding of cardiac arrhythmias.
BACKGROUND:Current outcomes from catheter ablation for scar-dependent ventricular tachycardia (VT) are limited by high recurrence rates and long procedure durations. Contrast-enhanced cardiac magnetic resonance images were used to reconstruct finite-element meshes, onto which regional electrophysiological properties were applied.
Five criteria predict whether patients are likely or unlikely to have supraventricular tachycardia induced or ablated at an electrophysiologic study (EPS). Methods We performed a retrospective chart review of 1089 patients referred for EPS and ablation of SVT at 2 high volume centers. Termination of SVT with adenosine.
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.
There is limited data regarding safety, electrophysiologic characteristics and arrhythmia substrate during ventricular tachycardia (VT) ablation in patients with prior aortic valve replacement (AVR).
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.
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.
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.
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.
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
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.
Epicardial Marshall bundle (MB) are frequently utilized in left atrial tachycardias (LATs) post atrial fibrillation (AF) ablation with pulmonary vein isolation and substrate modification.
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.
Atrial tachycardia (AT) is commonly observed following orthotopic biatrial heart transplantation (O-BA-HTx). There remains some controversy regarding their clinical presentation, relationship with atrial anastomoses, and electrophysiologic characteristics.
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.
The two ECGs above were texted to me with the text: "Young Guy came in in SVT but now in and out of irregular wide complex tachycardia. -- not sure if polymorphic VT vs. a fib with WPW." Finally — Did you notice the very tall T waves in multiple leads after each ablation? My response: "Definitely not polymorphic VT.
Establishing the precise mechanism of cardiac arrhythmias in the electrophysiology laboratory is one of the main requisites for a successful and safe ablation.
Hence, the electrophysiological and ablation target characteristics are poorly described. Focal AT at the aorta-mitral annulus conjunction (AMC) is uncommon.
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%.
Different types of recurrent atrial tachycardias (ATs) following Cox-Maze procedures have been reported, while biatrial tachycardia (BiAT) have not been systematically analyzed.
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?
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).
Pulsed-field ablation (PFA) is becoming increasingly relevant in the field of electrophysiology. Data on the use is sparse, especially for atrial tachycardia (AT). Data on the use is sparse, especially for atrial tachycardia (AT).
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.
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.
A localized line of conduction block (LOB) identified during substrate mapping during baseline rhythm serves as lateral and depth boundaries for ventricular tachycardia (VT) circuit isthmus. However, the electrophysiological characteristics of RAP in relation to the VT circuit have yet to be fully investigated.
Ventricular tachycardia (VT) ablation in structural heart disease improves arrhythmia free survival. Procedural factors that influence these outcomes are not well described.
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).
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.
The standardized workflow included general anesthesia, a single transeptal puncture trough with a bidirectional, steerable visualizable sheath introduced into the left atrium accommodated a high density, penta-spline mapping catheter and a contact force sensor ablation catheter enabled to deliver vHPSD.
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.
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.
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.
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.
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.
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
ABSTRACT Background Recent advancements in ultra-high-density mapping (UHDM) featuring automated functionalities have enhanced our understanding of micro-reentrant atrial tachycardias (mAT) circuits and the precise localization of the origin. link] Identifier: NCT03793998.
Their implementation in the electrophysiology workflow has not been extensively described. Studies evaluating the systematic use of cardiac computed tomography (CCT) for the preprocedural assessment of myocardial fibrosis are limited.
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. A anterolateral AP was successfully ablated. Figure-7: Repeat ECG following ablation of the AP.
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).
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