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Circulation
JANUARY 6, 2025
Circulation, Ahead of Print. BACKGROUND:Current outcomes from catheter ablation for scar-dependent ventricular tachycardia (VT) are limited by high recurrence rates and long procedure durations.
85 
Circulation
MARCH 17, 2024
Circulation, Volume 149, Issue 12 , Page 963-966, March 19, 2024.
73 
Circulation
APRIL 20, 2025
Circulation, Volume 151, Issue 16 , Page 1204-1206, April 22, 2025.
45 
Dr. Smith's ECG Blog
FEBRUARY 8, 2015
They had already cardioverted at 120 J, then 200 J, which resulted in the following: Ventricular Tachycardia They then cardioverted at 200 J which r esulted in the same narrow complex rhythm shown above, at 185 beats per minute. This would treat both SVT or sinus tachycardia. I suggested esmolol if the heart rate did not improve.
52 
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.
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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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Circulation
FEBRUARY 23, 2025
Circulation, Volume 151, Issue 8 , Page 534-536, February 25, 2025.
45 Circulation
AUGUST 4, 2024
Circulation, Volume 150, Issue 6 , Page 506-508, August 6, 2024.
45 
Dr. Smith's ECG Blog
OCTOBER 23, 2023
Edited by Bracey, Meyers, Grauer, and Smith A 50-something-year-old female with a history of an unknown personality disorder and alcohol use disorder arrived via EMS following cardiac arrest with return of spontaneous circulation. Circulation. The described rhythm was an irregular, wide complex rhythm. No ischemic ST changes.
130 Circulation
NOVEMBER 11, 2024
Circulation, Volume 150, Issue Suppl_1 , Page A4143264-A4143264, November 12, 2024. This can initiate ventricular arrhythmias like polymorphic ventricular tachycardia (PMVT). Background:R-on-T phenomenon occurs when an electrical stimulus is delivered at a critical point during ventricular repolarization.
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Circulation: Arrhythmia and Electrophysiology
SEPTEMBER 25, 2024
Circulation: Arrhythmia and Electrophysiology, Ahead of Print.
40 
Circulation
AUGUST 4, 2024
Circulation, Volume 150, Issue 6 , Page e152-e152, August 6, 2024.
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Ken Grauer, MD
APRIL 13, 2024
That said — most patients eventually do become symptomatic ( Webb and Gatzoulis: Circulation 114: 1645-1653, 2006 ). Because of this, it is uncommon to see sinus tachycardia with a prolonged PR interval. ECG Blog #227 — Reviews the "Bix Rule" ( Looking for 2:1 atrial activity when you see a long PR interval with a tachycardia ).
116 
Dr. Smith's ECG Blog
FEBRUARY 6, 2024
The ECG shows sinus tachycardia with RBBB and LAFB, without clear additional superimposed signs of ischemia. Circulation: Cardiovascular Imaging. The Initial ECG in Today's Case: As per Dr. Meyers — the initial ECG in today's case shows sinus tachycardia with bifascicular block ( = RBBB/LAHB ). 2015, March 1). Cramer, M.
114 
Circulation: Arrhythmia and Electrophysiology
JANUARY 26, 2024
Circulation: Arrhythmia and Electrophysiology, Ahead of Print.
40 
Circulation: Arrhythmia and Electrophysiology
JANUARY 15, 2024
Circulation: Arrhythmia and Electrophysiology, Volume 17, Issue 1 , Page e000090, January 1, 2024.
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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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Dr. Smith's ECG Blog
SEPTEMBER 5, 2024
Sinus tachycardia has many potential causes. This is especially true for the elderly patient with sinus tachycardia. What is the cause of the sudden tachycardia? Angiography usually reveals an absence of collateral circulation to the infarct zone. The patient in today’s case suddenly became tachycardic while sleeping.
Circulation: Arrhythmia and Electrophysiology
NOVEMBER 27, 2024
Circulation: Arrhythmia and Electrophysiology, Volume 17, Issue 12 , Page e011681, December 1, 2024.
Dr. Smith's ECG Blog
JANUARY 1, 2024
While the initial impression might not immediately suggest ventricular tachycardia (VT), a closer examination raises suspicion. Additionally, the qR morphology, particularly in a patient with right bundle branch block (RBBB) type wide QRS complex tachycardia (WQCT), lends further support for VT. What is the rhythm?
111 
Dr. S. Venkatesan MD
APRIL 28, 2024
In all probability, this dilation is a form of atrial tachycardia and atrial cardiomyopathy. Spatial relationship of sites for atrial fibrillation drivers and atrial tachycardia in patients with both arrhythmias July 2017 International Journal of Cardiology 248(3) AF begets AF. Implications for electrophysiologists.
Circulation: Heart Failure
AUGUST 2, 2023
Circulation: Heart Failure, Volume 16, Issue 11 , Page e010406, November 1, 2023.
MIBHS
JANUARY 31, 2025
Abnormal readings can signal issues with circulation or lung function, prompting further investigation. Early detection of conditions like AFib, bradycardia, or tachycardia allows patients to address issues before they become critical. Sleep Monitoring Quality sleep is essential for heart health.
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Dr. Smith's ECG Blog
SEPTEMBER 18, 2024
This strip was obtained: Apparent Wide Complex Tachycardia at a rate of 280 What do you think? Troponins 34>33>43, likely secondary to myocardial injury from tachycardia. Sinus tachycardia does not go this fast. A 60-something ow healthy male had syncope while on treadmill. What do you want to do?
DAIC
DECEMBER 29, 2023
The trial will evaluate the outcomes of therapy provided with the FARAPULSE PFA System versus AADs, including device-or procedure-related adverse events, the rates of freedom from AF, atrial flutter, or atrial tachycardia, as well as AF burden – a measurement of the amount of AF an individual experiences. Circulation.
Dr. Smith's ECG Blog
JANUARY 29, 2013
The ECG was done because the heart rate was 230 and the differential included SVT vs. sinus tachycardia. This is typical of pediatric ECGs because the fetal circulation depends on the right ventricle. Thus, what appear to be p-waves are indeed p-waves (see leads II and V1). This is from a febrile 3 month old infant.
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Dr. Smith's ECG Blog
SEPTEMBER 29, 2024
This usually represents posterior OMI, but in tachycardia and especially after cardiac arrest, this could simply be demand ischemia, residual subendocardial ischemia due to the low flow state of the cardiac arrest. This prompted cath lab activation. On arrival to the ED, this ECG was recorded: What do you think?
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EMS 12-Lead
AUGUST 22, 2022
From afar, there is gross tachycardia, cadence irregularities, and narrow QRS complexes that may, or may not, be Sinus in origin; and finally – a cacophony of wide complexes that might very well be ventricular in origin. McLaren : We’ve answered the first question – Sinus Tachycardia with episodic runs of wide QRS (RBBB morphology) and PVC’s.
52 Circulation
NOVEMBER 15, 2023
Circulation, Ahead of Print. Carbachol administration induced torsades de pointes or ventricular tachycardia for homozygous T1307M mice (20%) but not for heterozygous or wild-type mice. BACKGROUND:Pathogenic variants inSCN5Acan result in long QT syndrome type 3, a life-threatening genetic disease.
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Circulation
NOVEMBER 11, 2024
Circulation, Volume 150, Issue Suppl_1 , Page A4146485-A4146485, November 12, 2024. The presence or absence of five predetermined cardiac arrhythmias were evaluated: atrial fibrillation/flutter (AFIB), ventricular bigeminy, ventricular trigeminy, ventricular tachycardia (VT), and high-grade atrioventricular block (AVB).Results:The
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Circulation
NOVEMBER 11, 2024
Circulation, Volume 150, Issue Suppl_1 , Page A4143624-A4143624, November 12, 2024. Background:In diabetic ketoacidosis (DKA), cardiac complications such as QTc interval prolongation can pose a risk for ventricular tachycardia.
40 Circulation
NOVEMBER 11, 2024
Circulation, Volume 150, Issue Suppl_1 , Page A4121816-A4121816, November 12, 2024. Case Description:A 19-year-old man presented to the emergency department for 3 days of shortness of breath, progressive bilateral lower extremity rash, generalized fatigue, and diffuse joint following an earlier visit to urgent care for pharyngitis symptoms.
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Circulation
NOVEMBER 11, 2024
Circulation, Volume 150, Issue Suppl_1 , Page A4145609-A4145609, November 12, 2024. Introduction:Cannabis has been increasingly used as a recreational drug. Its cardiovascular effects depend on several factors, including the exact composition, route of administration, dose, and duration of use.
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Circulation
NOVEMBER 11, 2024
Circulation, Volume 150, Issue Suppl_1 , Page A4136459-A4136459, November 12, 2024. Ventricular arrhythmias (VA), such as ventricular fibrillation and ventricular tachycardia, are the major causes of mortality among patients with CAD.
Circulation
NOVEMBER 11, 2024
Circulation, Volume 150, Issue Suppl_1 , Page A4119267-A4119267, November 12, 2024. Repeat TTE and EKG then noted newly enlarged left atrium and atrial tachycardia. Background:Sarcoidosis, a systemic granulomatous inflammatory disorder can involve various organs, including the heart but isolated bi-atrial cardiac involvement is rare.
40 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. mg twice daily or placebo for 10 days. mg twice daily or placebo for 10 days. The first dose of the study drug was administered within 4 hours before ablation.
Circulation
NOVEMBER 11, 2024
Circulation, Volume 150, Issue Suppl_1 , Page A4140763-A4140763, November 12, 2024. Case Descripton:A 34-year-old male with Schizophrenia was transferred from inpatient Psychiatry unit for chest tightness, fevers andtachycardia after testing positive for COVID-19. presentation, he was febrile (39.1°C) presentation, he was febrile (39.1°C)
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Circulation
NOVEMBER 11, 2024
Circulation, Volume 150, Issue Suppl_1 , Page A4139975-A4139975, November 12, 2024. This may substantially impact signal fidelity when the same wave is not present throughout this volume, such as in AF or ventricular fibrillation, and may impact noise detection for atrial and ventricular tachycardia.
Dr. Smith's ECG Blog
JANUARY 1, 2013
Notice there is tachycardia. I have warned in the past that one must think of other etiologies of ischemia when there is tachycardia. In this case, the patient had failed to take his atenolol in the AM and was having reflex tachycardia in addition to ACS. Circulation 2007;115(10):1306-24. BP was 160/100. younger smoker).
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Dr. Smith's ECG Blog
DECEMBER 7, 2023
Circulation: Cardiovascular Interventions , 7(5), 645–655. Buller, C. Starovoytov, A., Robinson, S., Vuurmans, T., Humphries, K., & & Mancini, G. Spontaneous coronary artery dissection. link] The patient was managed conservatively and started on medical therapy including nitrates with resolution of her symptoms.
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All About Cardiovascular System and Disorders
FEBRUARY 14, 2024
In fact the Circulation article cited is on Complete Transposition of the Great Vessels. 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.
Dr. Smith's ECG Blog
NOVEMBER 30, 2019
Is it ventricular tachycardia (VT) due to hyperK or is it a supraventricular rhythm with hyperK? Here are other posts on hyperK, large calcium doses for hyperK, and ventricular tachycardia in hyperK Weakness, prolonged PR interval, wide complex, ventricular tachycardia Very Wide and Very Fast, What is it? How would you treat?
Dr. Sanjay Gupta
AUGUST 31, 2022
POTS stands for postural orthostatic tachycardia syndrome. Let’s call it Postural Orthostatic Tachycardia Syndrome – that’s not really a diagnosis – it’s just a medical jargon filled term for what the patient has just told us. If we can therefore increase the circulating volume, then patients do feel better.
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Dr. Smith's ECG Blog
FEBRUARY 2, 2017
Here is the ECG: Sinus tachycardia. mEq of K pushed fast and circulated theoretically would raise serum K immediately by 1.0 This patient presented with severe DKA. What do you think? The computer and physician reader wrote: "ST depression, consider subendocardial injury." The computer read the QT as 365 ms and the QTc as 424 ms.
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