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Arrhythmia Electrophysiology Tachycardia 
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).
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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
JUNE 27, 2024
A 21-year-old woman presented to arrhythmia clinic with episodes of recurrent paroxysmal rapid palpitations. The patient had undergone an electrophysiology study and radiofrequency ablation elsewhere and was subsequently referred to our centre. What is the mechanism of the tachycardia?
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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.
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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.
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Journal of the American Heart Association
DECEMBER 8, 2023
The primary end point was syncope recurrence, and the secondary end point was the reduction of the ventricular arrhythmia score during exercise testing. events per year;P<0.001) and improved the ventricular arrhythmia scores at the 3‐month (5 [range, 3–6] to 1.5
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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.
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Frontiers in Cardiovascular Medicine
JULY 8, 2024
BackgroundHuman pluripotent stem cell-derived cardiomyocytes (hPSC-CMs) show tremendous promise for cardiac regeneration following myocardial infarction (MI), but their transplantation gives rise to transient ventricular tachycardia (VT) in large-animal MI models, representing a major hurdle to translation.
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HeartRhythm
MARCH 12, 2024
A 15-year-old young male, presented to arrhythmia clinic with episodes of recurrent paroxysmal palpitations, lasting for several hours, requiring multiple admissions and DC cardioversion in the local hospital. What is the mechanism of the tachycardia? The 12 lead ECG (figure 1) and intracardiac recordings (figure 2) are shown below.
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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).
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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
JANUARY 4, 2024
Abstract Introduction We report the case of an 18-year-old female with recurrent syncope that was discovered to have congenital long QT syndrome (LQTS) and episodes of a transiently short QT interval after spontaneous termination of polymorphic ventricular tachycardia.
40 Journal of Cardiovascular Electrophysiology
JULY 16, 2024
Abstract Introduction Patients with viral myocarditis can present with challenging life-threatening arrhythmias. Catheter ablation can be a life-saving procedure in some patients with recurrent drug-refractory ventricular arrhythmias.
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Circulation: Arrhythmia and Electrophysiology
JANUARY 15, 2024
Circulation: Arrhythmia and Electrophysiology, Volume 17, Issue 1 , Page e000090, January 1, 2024.
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HeartRhythm
NOVEMBER 21, 2023
An eager electrophysiology fellow was sitting next to his mentor, on the plane ride back from the American College of Cardiology Scientific Sessions, putting together slides on highlights of the meeting. The results of the Multicenter Unsustained Tachycardia Trial (MUSTT) were presented at the late breaking sessions.
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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.
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Circulation: Arrhythmia and Electrophysiology
JANUARY 26, 2024
Circulation: Arrhythmia and Electrophysiology, Ahead of Print.
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.
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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%
40 Journal of Cardiovascular Electrophysiology
FEBRUARY 8, 2024
Patients with Brugada syndrome who are asymptomatic and have no ventricular tachycardia/ventricular fibrillation inducibility by programmed electrical stimulation are at extremely low risk of experiencing late life-threatening arrhythmias. Methods Patients with BrS ( n = 523; mean age, 51 ± 13 years; male, n = 497) were enrolled.
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All About Cardiovascular System and Disorders
MARCH 25, 2024
This measurement has been correlated with those made at electrophysiology study and may predict the potential risk of rapid anterograde conduction if the person develops atrial fibrillation. QT prolongation and the occurrence of ventricular arrhythmias with exercise are another important aspect of exercise testing in children.
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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.
HeartRhythm
NOVEMBER 30, 2023
The advent of transseptal puncture has enabled the study of atrial fibrillation mechanisms, while epicardial access has enabled exploration of the epicardium in ventricular arrhythmias (ventricular tachycardia/ventricular fibrillation [VF]).1,2
Journal of Cardiovascular Electrophysiology
OCTOBER 19, 2023
Although the QDOT MICRO™ Catheter was mainly designed for pulmonary vein isolation (PVI) its versatility to treat atrial fibrillation (AF) and other types of arrhythmias was recently evaluated by the FAST and FURIOUS study series and other studies and will be presented in this article.
40 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).
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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.
Circulation: Arrhythmia and Electrophysiology
DECEMBER 21, 2023
Circulation: Arrhythmia and Electrophysiology, Ahead of Print. Colchicine did not prevent atrial arrhythmia recurrence at 2 weeks (31% versus 32%; hazard ratio [HR], 0.98 [95% CI, 0.59–1.61];P=0.92) BACKGROUND:Inflammation may promote atrial fibrillation (AF) recurrence after catheter ablation. 2.02];P=0.89). 1.99];P=0.55).CONCLUSIONS:Colchicine
Journal of Cardiovascular Electrophysiology
AUGUST 20, 2024
Abstract Introduction We report the case of a 37-year-old male athlete, who developed during exercise atrial and ventricular arrhythmias. Conclusions The findings in our patient may suggest some increased ventricular excitability using programmed ventricular stimulation in CASQ2 polymorphic ventricular tachycardia patients.
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All About Cardiovascular System and Disorders
MARCH 30, 2024
This can be a source of cardiac arrhythmia as well. An important cause of arrhythmias in Ebstein’s anomaly is the presence of a right sided accessory atrioventricular pathway or WPW syndrome. Electrophysiological study will show that, and this pathway can be ablated. This portion is known as atrialized right ventricle.
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DAIC
DECEMBER 29, 2023
Unlike paroxysmal AF, which describes symptoms that last for seven days or fewer, persistent AF is a sustained arrhythmia that lasts for more than a week 1. Early treatment of persistent AF can reduce the risk of blood clots, stroke, and heart failure, and may prevent the disease from becoming permanent.
Dr. S. Venkatesan MD
JUNE 16, 2024
Any deviation or trespassing results in arrhythmia. The term, VT mapping has been in vogue in clinical electrophysiology for more than half a century, right from Dr.Josephson and Wellens’ days. Reference Alexios Hadjis , Antonio Frontera. 2020;13:e008651. DOI: 10.1161/CIRCEP.120.008651
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All About Cardiovascular System and Disorders
OCTOBER 26, 2023
This is the proposed mechanism of precipitation of arrhythmias in Brugada syndrome during febrile episodes. There is a potential risk for drug challenge in that life threatening ventricular arrhythmias could be precipitated. Opinion is divided on the need for electrophysiology study. With proper precautions, risk can be reduced.
Journal of Cardiovascular Electrophysiology
FEBRUARY 7, 2024
Chagas disease (ChD) was associated with increased rates of ventricular tachycardia and ventricular fibrillation in ICD patients only in the initial two periods, but there was no statistical difference in the last period. Time periods were chosen based on the establishment of the Arrhythmia Service in 2011.
Dr. Smith's ECG Blog
JANUARY 9, 2024
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.
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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). [ii]
59 Journal of Cardiovascular Electrophysiology
JANUARY 10, 2024
ms after) and AF termination to atrial tachycardia (AT) or sinus rhythm (SR) in 12 patients (24%). After a blanking period of 6 weeks, recurrence of any atrial arrhythmia was documented in 26 patients (52%). Most arrhythmia recurrences were reentrant AT. to 202.2 ± 21.6 ms After a total of 1.46 ± 0.68
Dr. Smith's ECG Blog
MAY 14, 2022
Here is his ED ECG: Regular Wide Complex Tachycardia at a rate of 229 First : What do you want to do? Before getting into analysis, a regular wide complex tachycardia could be 1. ventricular tachycardia ( VT ) or 2. AV reciprocating tachycardia ( AVRT , antidromic WPW) or 3. Next : What do you think is the ECG diagnosis?
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Dr. Smith's ECG Blog
MARCH 6, 2020
Here was his ED ECG: There is sinus tachycardia (rate about 114) with nonspecific ST-T abnormalities. An ECG was recorded: This shows a regular narrow complex tachycardia at a rate of about 160. See my quick review of atrial tachycardia below) The tachycardia spontaneously resolved. BP:143/99, Pulse 109, Temp 37.2 °C
Dr. Smith's ECG Blog
APRIL 24, 2022
The ECG there reportedly showed an irregular tachycardia, and the patient was immediately referred to the emergency room. Here is her ECG on arrival: There is a wide complex tachycardia that is irregularly irregular (this is difficult to determine at these very high rates). Vitals were within normal limits other than heart rate.
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Dr. Smith's ECG Blog
SEPTEMBER 7, 2020
Here is his 12-lead: There is a wide complex tachycardia with a rate of 257, with RBBB and LPFB (right axis deviation) morphology. Read about Fascicular VT here: Idiopathic Ventricular Tachycardias for the EM Physician Case Continued He was completely stable, so adenosine was administered. See Learning point 1 below. Arch Intern Med.
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DAIC
JULY 24, 2024
Volta Medical has announced it has entered into a Joint Development Agreement with GE Healthcare to enhance arrhythmia procedures with artificial intelligence (AI)-driven electrophysiology technologies. Our mission to combat complex heart rhythm diseases relies on optimizing interoperability.
All About Cardiovascular System and Disorders
FEBRUARY 14, 2024
Fragmented QRS is a marker of myocardial scar and consequent arrhythmias in ischemic and nonischemic cardiomyopathy. Ebstein’s anomaly may be associated with right sided accessory pathway in ventricular pre-excitation, that is WPW syndrome, with or without atrioventricular re-entrant tachycardia.
EMS 12-Lead
APRIL 28, 2022
Initial vital signs include: NIBP 99/58 HR 150-160 (trend) RR 10 (spontaneous, but shallow) SpO2 86 (RA) BBS CTA The initial rhythm strip is attached: Figure 1 There is a wide complex tachycardia of varying morphology, amplitude, and R-R cycle length. Josephson’s Clinical Cardiac Electrophysiology: Techniques and Interpretations (6th ed).
52 Journal of Cardiovascular Electrophysiology
DECEMBER 7, 2023
However, previous studies have shown that very high power short duration ablation (VHPSD) is also highly effective and fast to achieve PVI with potentially less arrhythmia recurrence compared to conventional radiofrequency ablation. Data comparing PFA to VHPSD-PVI is lacking.
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