Dr. Smith's ECG Blog

JUNE 28, 2023

A prehospital 12-lead was recorded: There is a regular wide complex tachycardia. The computer diagnosed this as Ventricular Tachycardia. There is a wide complex regular tachycardia at a rate of 226. Toothache, incidental Wide Complex Tachycardia Could it be fascicular VT or Bundle Branch VT ( i.e., idiopathic VT )?

Tachycardia 98

Tachycardia Ultrasound Heart Disease Atrial Fibrillation 98

Cardiomatics

APRIL 5, 2024

Sinus tachycardia – sinus rhythm above 100 bpm is a sinus tachycardia. Ventricular tachycardia – more than 7 consecutive complexes originating from ventricles at a rate of > 100 bpm. Supraventricular tachycardia – more than 7 consecutive complexes of supraventricular beats at a rate of > 100 bpm.

Arrhythmia 92

Arrhythmia Tachycardia Bradycardia Heart Rhythm 92

Dr. Smith's ECG Blog

JANUARY 5, 2020

Here is the computer interpretation: ATRIAL FIBRILLATION WITH RAPID VENTRICULAR RESPONSE WITH ABERRANT CONDUCTION OR VENTRICULAR PREMATURE COMPLEXES LEFT AXIS DEVIATION [QRS AXIS beyone -30] NONSPECIFIC ST and T-WAVE ABNORMALITY The over-reading physician confirmed this diagnosis, which is incorrect. It is not atrial fibrillation.

Atrial Fibrillation 52

Atrial Fibrillation Tachycardia Arrhythmia Pulmonary 52

Frontiers in Cardiovascular Medicine

DECEMBER 14, 2023

Typical atrial flutter commonly occurs in patients with atrial fibrillation (AF). Limited information exists regarding the effects of concurrent atrial flutter on the long-term outcomes of rhythm control. Patients who were screened for typical atrial flutter were included in the analysis ( n  = 1,907).

Atrial Flutter 64

Atrial Flutter Atrial Fibrillation Ablation Arrhythmia 64

HeartRhythm

APRIL 30, 2024

Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a rare disorder presenting as exercise-induced ventricular arrhythmias, rarely associated with mutations in triadin (TRDN).

Atrial Fibrillation 40

Atrial Fibrillation Tachycardia Exercise Arrhythmia 40

Dr. Smith's ECG Blog

JANUARY 9, 2024

She also has a hx of paroxysmal atrial fibrillation and is on oral anticoagulant treatment. 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. Cardiac output (CO) was being maintained by the tachycardia.

Tachycardia 119

Tachycardia Electrophysiology Atrial Flutter Ischemia 119

Frontiers in Cardiovascular Medicine

MARCH 27, 2024

We reported the case of a 51-year-old woman who experienced multiple types of arrhythmias over three decades and was diagnosed with Danon disease late by genetic testing. Case summary A 51-year-old woman with a 36-year history of intermittent palpitations was admitted due to hemodynamically stable ventricular tachycardia (VT).

Arrhythmia 59

Arrhythmia Atrial Flutter Tachycardia Atrial Fibrillation 59

Journal of the American Heart Association

FEBRUARY 13, 2024

BackgroundScreening for atrial fibrillation (AF) may reveal incidental arrhythmias of relevance. We furthermore report treatment decisions because of incidental arrhythmias. We furthermore report treatment decisions because of incidental arrhythmias. We found incidental arrhythmias in 94 patients (11.8%).

Atrial Fibrillation 40

Atrial Fibrillation Arrhythmia Hospital Tachycardia 40

Open Heart

JANUARY 20, 2022

Background Cardiac arrhythmias have been observed among patients hospitalised with acute COVID-19 infection, and palpitations remain a common symptom among the much larger outpatient population of COVID-19 survivors in the convalescent stage of the disease. Participants were instructed to trigger the monitor for palpitations.

COVID-19 52

COVID-19 Arrhythmia Outpatient Atrial Flutter 52

Cardiovascular Diabetology

FEBRUARY 23, 2024

Objective We aimed to assess the effect of SGLT2i on arrhythmias by conducting a meta-analysis using data from randomized controlled trials(RCTs). Background Sodium-glucose co-transporter 2 inhibitors (SGLT2i) have shown cardioprotective effects via multiple mechanisms that may also contribute to decrease arrhythmias risk.

Sudden Cardiac Death 64

Sudden Cardiac Death Arrhythmia Atrial Flutter Heart Failure 64

HeartRhythm

APRIL 30, 2024

Wild-type transthyretin amyloid cardiomyopathy (ATTRwt-CM) is often accompanied by atrial fibrillation (AF), atrial flutter (AFL), and atrial tachycardia (AT), which are difficult to control because beta-blockers and antiarrhythmic drugs can worsen heart failure (HF).

Atrial Flutter 40

Atrial Flutter Atrial Fibrillation Tachycardia Cardiomyopathy 40

HeartRhythm

APRIL 30, 2024

The rate of ICD implantation has risen due to the increasing population age and the growing prevalence of cardiac arrhythmias. Patients with ICDs who experience atrial fibrillation (AF) have a higher risk of stroke, heart failure, and mortality.

Atrial Fibrillation 40

Atrial Fibrillation Defibrillator Sudden Cardiac Death Tachycardia 40

Frontiers in Cardiovascular Medicine

FEBRUARY 17, 2025

Backgroundwide antral pulmonary vein isolation (PVI) is effective for treating paroxysmal atrial fibrillation (PAF), although time-demanding. Procedural data and electrophysiology (EP) laboratory times were systematically collected and analyzed.

Atrial Fibrillation 52

Atrial Fibrillation Ablation Laboratory Electrophysiology 52

Open Heart

SEPTEMBER 28, 2022

Objectives Examine the association between arrhythmias and adverse maternal outcomes in women with structurally normal hearts. Arrhythmia was previously diagnosed in 58.0% After adjusting for age, parity and comorbidities, the presence of any arrhythmia was an independent predictor of CS (OR 1.7 SVT cases but only in 9.7%

Arrhythmia 52

Arrhythmia Tachycardia Atrial Fibrillation Outcomes 52

HeartRhythm

JUNE 30, 2024

Atrial arrhythmias are an important source of morbidity in adults with congenital heart disease (CHD) and have been linked to sudden death in certain subgroups. Whereas intra-atrial reentrant tachycardia (IART) is the most common arrhythmia, the prevalence of atrial fibrillation (AF) is increasing.

Congenital Heart Disease 40

Congenital Heart Disease Congenital Arrhythmia Heart Disease 40

Journal of Cardiovascular Electrophysiology

APRIL 2, 2025

The Kaplan-Meier curve of all-atrial arrhythmia-free survival for (A) all persistent patients and (B) patients who underwent PSM conducted to the higher recurrence rate in PVI + group. Conclusions PVI plus extra PV ablation using a pentaspline PFA catheter is associated with a higher incidence of atrial tachycardia recurrences.

Atrial Fibrillation 40

Atrial Fibrillation Ablation Tachycardia Tricuspid 40

Dr. Smith's ECG Blog

DECEMBER 13, 2024

Since the patient was stable and tolerating the arrhythmia it was decided to treat with IV Amiodarone for medical conversion. Whenever it is this fast, you need to be very careful to ascertain whether it is irregular ( as in atrial fibrillation with rapid ventricular respsonse ) or regular ( as in VT ). It is not VT; it is AF.

AFIB 103

AFIB Atrial Fibrillation Tachycardia Blog 103

Journal of Cardiovascular Electrophysiology

JANUARY 15, 2024

Abstract Introduction Atrial fibrillation and atrial flutter originating from the donor s heart is a commonly reported complication post heart transplant. Case A 47-year-old male presented with atrial tachycardia 6 months post heart transplant.

Atrial Fibrillation 40

Atrial Fibrillation Heart Transplant Atrial Flutter Transplant 40

Dr. Smith's ECG Blog

JULY 5, 2018

PMH: Known paroxysmal Atrial fib. He is usually is in sinus rhythm as far as he knows, but he cannot subjectively feel atrial fibrillation, so he is never completely certain when he is in sinus or atrial fib. Here is his ECG: Atrial Fib with a Ventricular Response of about 66. He immediately completely recovered.

Atrial Fibrillation 52

Atrial Fibrillation AFIB Bradycardia Pacemaker 52

Frontiers in Cardiovascular Medicine

JUNE 6, 2024

Cardio-oncology is a new field of interest in cardiology focusing on the detection and treatment of cardiovascular diseases, such as arrhythmias, myocarditis, and heart failure, as side-effects of chemotherapy and radiotherapy. The association between chemotherapeutic agents and arrhythmias has previously been established.

Tachycardia 40

Tachycardia Cancer Cardio Oncology Arrhythmia 40

Open Heart

JULY 28, 2023

Introduction The incidence of arrhythmia in heart failure with non-reduced ejection fraction (HFnon-rEF) in patients who have a history of hospitalisation is unclear. Methods and analysis This is a multicentre single arm study to evaluate the usefulness of ILR for detecting arrhythmia.

Atrial Fibrillation 40

Atrial Fibrillation Arrhythmia Heart Failure Tachycardia 40

Dr. Smith's ECG Blog

FEBRUARY 6, 2024

The ECG shows sinus tachycardia with RBBB and LAFB, without clear additional superimposed signs of ischemia. Atrial fibrillation is also a predictor of worse outcomes in this case (Alborzi). Sinus Tachycardia ( common in any trauma patient. ). He was intubated for altered mental status. QTc prolongation.

Tachycardia 115

Tachycardia Dysrhythmia Atrial Fibrillation Bradycardia 115

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. 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) 2.02];P=0.89).

Atrial Fibrillation 40

Atrial Fibrillation Ablation Chest Pain Atrial Flutter 40

Dr. Smith's ECG Blog

NOVEMBER 26, 2018

Chart review confirmed that he had been started on flecainide for atrial fibrillation. This new information makes the diagnosis of atrial flutter far more likely: first, atrial fibrillation and flutter are closely associated and, second, this makes a flutter rate of 200 bpm (with 1:1 conduction) quite likely.

Ischemia 52

Ischemia Atrial Flutter Arrhythmia Tachycardia 52

ECG Guru

SEPTEMBER 13, 2023

What arrhythmia is present? Let's first consider the heart rate: with a heart rate of 194 beats/min, the heart rate is too low for atrial flutter (1:1) (except in patients who have been pre-treated with medication), and the rate would be unusually high for atrial flutter with 2:1 conduction.

Atrial Flutter 52

Atrial Flutter Atrial Fibrillation Tachycardia Heart Rhythm 52

Dr. Smith's ECG Blog

JULY 5, 2024

There is a regular wide complex tachycardia. Remember : Adenosine is safe in Regular Wide Complex Tachycardia. Adenosine is only unsafe in atrial fibrillation with WPW , which presents with a very rapid rate, polymorphic QRS, and some very short RR intervals] Bedside echo showed poor LV fct. We want to avoid a stroke.

Atrial Flutter 113

Atrial Flutter Tachycardia Atrial Fibrillation AFIB 113

Dr. Smith's ECG Blog

AUGUST 13, 2020

His previous echo one month prior shows the same thing: “consistent with old infarct in LAD vascular territory, with EF 45%” "I think there is something else causing his tachycardia which is exaggerating his EKG findings and mimicking an acute myocardial infarction." Looks like atrial fibrillation. Cath lab was cancelled.

Tachycardia 52

Tachycardia AFIB Cardiogenic Shock Myocardial Infarction 52

Dr. Smith's ECG Blog

OCTOBER 23, 2023

An Initial ECG was performed: Initial ECG: Sinus tachycardia with prolonged QT interval (QTc of 534 ms by Bazett). She was admitted to the ICU where subsequent ECGs were performed: ECG at 12 hours QTc prolongation, resolution of T wave alternans ECG at 24 hours Sinus tachycardia with normalized QTc interval. No ischemic ST changes.

Tachycardia 131

Tachycardia Cardiac Arrest ICU Blog 131

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%

Arrhythmia 40

Arrhythmia Ablation Tachycardia Atrial Fibrillation 40

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.

Arrhythmia 40

Arrhythmia Ablation Atrial Flutter Atrial Fibrillation 40

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.

Exercise 52

Exercise Pediatrics Congenital Tachycardia 52

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%).

Atrial Fibrillation 40

Atrial Fibrillation Ablation Outpatient Arrhythmia 40

Dr. Smith's ECG Blog

SEPTEMBER 29, 2023

It's a very "fun" ECG, with initial ectopic atrial tachycardia (negative P waves in inferior leads conducting 1:1 with the QRSs), followed by spontaneous resolution to sinus rhythm. Unfortunately the patient was erroneously diagnosed with "SVT / atrial fibrillation" and put on apixaban!!! What About the Tachycardia?

Chest Pain 130

Chest Pain Tachycardia STEMI Blog 130

Dr. Smith's ECG Blog

DECEMBER 16, 2018

Wide-complex tachycardia: VT or aberrant, or "other?" The patient had a history of paroxysmal atrial fibrillation and several cardioversions. A wide-complex tachycardia in an older patient must immediately suggest ventricular tachycardia. second ), in which the tachycardia is sustained. Note of Caution!

Tachycardia 52

Tachycardia Atrial Flutter AFIB Atrial Fibrillation 52

Dr. Smith's ECG Blog

APRIL 15, 2020

Here is her ED ECG: Here is the ED physician's interpretation: IMPRESSION UNCERTAIN REGULAR RHYTHM, wide complex tachycardia, likely p-waves. LEFT BUNDLE BRANCH BLOCK [120+ ms QRS DURATION, 80+ ms Q/S IN V1/V2, 85+ ms R IN I/aVL/V5/V6] Comparison Summary: LBBB and tachycardia are new. This is clearly ventricular tachycardia.

Tachycardia 52

Tachycardia Nursing Heart Disease Dysrhythmia 52

MIBHS

JANUARY 31, 2025

Detection of Irregular Heart Rhythms Devices such as the Apple Watch or Fitbit Sense can detect irregular heart rhythms, including atrial fibrillation (AFib). Early detection of conditions like AFib, bradycardia, or tachycardia allows patients to address issues before they become critical.

Heart Rhythm 52

Heart Rhythm Technology AFIB Exercise 52

Dr. Smith's ECG Blog

DECEMBER 23, 2019

Initial ECG in the ED: Presenting ECG : Wide-complex tachycardia at a rate about 200. This is overwhelmingly likely to be ventricular tachycardia, even if only age and medical history are considered. Nevertheless, the widths of both the QRS complex and the RS duration are similar in both the old ECG and the tachycardia.

Tachycardia 52

Tachycardia Atrial Flutter Cardiomyopathy Atrial Fibrillation 52