Dr. Smith's ECG Blog

JUNE 5, 2024

The ECG does not show any definite signs of ischemia. Uncontrolled coronary spasm may be associated with serious arrhythmias , including cardiac arrest ( Looi et al — Postgrad Med, 2012 ; Tan et al — Eur Heart J Case Rep, 2018 ; Chevalier et al — JACC, 1998 ; Rodriguez-Manero — EP Europace, 2018 ).

Chest Pain 101

Chest Pain Cardiac Arrest Blog Cardiomyopathy 101

Dr. Smith's ECG Blog

OCTOBER 8, 2023

Remember, in diffuse subendocardial ischemia with widespread ST-depression there may b e ST-E in lead s aVR and V1. There are well formed R-waves with good voltage/amplitude which is uncommon for ischemia. The ECG does not show any signs of ischemia. True Positive ECG#2 : Also sinus rhythm. There is ST depression in V1.

Ischemia 103

Ischemia Chest Pain Cardiogenic Shock Cardiac Arrest 103

Dr. Smith's ECG Blog

JANUARY 21, 2023

This ECG shows a sinus bradycardia with a normal conduction pattern (normal PR, normal QRS, and normal QTc), normal axis, normal R-wave progression, normal voltages. Hypothermia can also produce bradycardia and J waves, with a pseudo-STEMI pattern. There is marked sinus bradycardia. What do you think? Pacing Clin Electrophysiol.

STEMI 52

STEMI Bradycardia Arrhythmia Cardiac Arrest 52

Dr. Smith's ECG Blog

MAY 6, 2019

Followup ECG: No Change Absence of evolution is the best evidence against ischemia as the etiology. I was taught that the tell-tale sign of ischemia vs an electrical abnormality was in the hx, i.e. chest pain for the ischemia and potential syncope for brugada. Ischemia/infarction. Bradycardia. Hypothermia.

Chest Pain 52

Chest Pain STEMI Ischemia Myocardial Infarction 52

Dr. Smith's ECG Blog

MARCH 15, 2023

IF the Patient is Younger and Athletic: The mechanism of AFib in younger, athletic individuals is often heavily influenced by increased vagal tone ( Rao and Shipon — ACC, 2019 — and — Calvo et al — Br J Sports Med, 2012 ). Baseline bradycardia in endurance athletes limits the use of ß-blockers.

Atrial Fibrillation 52

Atrial Fibrillation AFIB Arrhythmia Exercise 52

Dr. Smith's ECG Blog

JANUARY 30, 2019

Induced Brugada-type electrocardiogram, a sign for imminent malignant arrhythmias. Circulation, 117, 1890–1893. [3]: 3]: Lamelas P, Labadet C, Spernanzoni F, Lopez Saubidet C, and Alvarez PA. Brugada electrocardiographic pattern induced by fever. World Journal of Cardiology, 4(3): 84-86. [4]: 4]: Antzelevitch C and Brugada R.

Heart Rhythm 52

Heart Rhythm Sudden Cardiac Death Arrhythmia STEMI 52