Wide QRS

ECG STAT April 2, 2025

Polymorphic Ventricular Tachycardia (PMVT)

Key Points Definition: PMVT is a ventricular tachycardia characterized by beat-to-beat variations in QRS morphology, axis, and duration, reflecting multiple ventricular foci or reentrant circuits. Clinical Importance: PMVT is often…

ECG STAT March 28, 2025

Sodium Channel Blocker Toxicity

Key Points Recognizing the Danger: Sodium channel blocker toxicity can present with a variety of ECG changes that are critical to recognize, especially in patients with altered mental status or…

ECG STAT March 20, 2025

Nonsustained Ventricular Tachycardia

Key Points Definition: NSVT is defined as ≥3 consecutive ventricular beats, QRS duration >120 ms, rate typically 100-250 bpm (usually > 120 bpm), lasting less than 30 seconds without causing…

ECG STAT December 14, 2024

Left Bundle Branch Block (LBBB)

Key Points Definition: LBBB occurs when electrical conduction through the left bundle branch is delayed or blocked, resulting in asynchronous and delayed activation of the left ventricle (LV) and a…

Weekly Workout October 23, 2023

Wide Complex Tachycardias: does response to Valsalva maneuvers or adenosine rule out ventricular tachycardia?

A 54-year-old man with no significant PMHx presents to the ED with palpitations. He is hemodynamically stable with a normal blood pressure. The following ECG is obtained prior to the…

Weekly Workout July 24, 2023

Differential Diagnoses: must know causes of right axis deviation and wide QRS complexes

A 30-year-old man is pulled over by police for speeding. He begins feeling nauseous and has multiple episodes of vomiting. During transport to the emergency department by EMS he is…

Weekly Workout January 18, 2021

Differential Diagnoses: important considerations in patients with new onset seizures or altered mental status, must know diagnoses in the emergency department

A 40-year-old man is brought into the ED after being found in the street and noted to have intermittent seizures. He is tachycardic, hypertensive, and febrile. The following ECG was…

Weekly Workout January 1, 2018

Differential Diagnoses: wide QRS, right axis deviation, tall R wave in V1

A 76-year-old woman presents to the ED with dyspnea and a syncopal episode. History is limited because the patient is listless and confused. The following ECG was obtained:

Weekly Workout October 2, 2017

Literature Review: Wolff-Parkinson-White syndrome with atrial fibrillation

A 50-year-old man is referred from clinic to the ED for chest tightness for the past 3 hours and a presumed new left bundle branch block. He is found to…

Weekly Workout March 13, 2016

STAT ECG Diagnoses: must know ECG differentials in the evaluation of patients with altered mental status

A young woman presents to the ED unconscious with a GCS of 4. The following ECG was obtained during the initial evaluation:

Weekly Workout July 27, 2015

ECG Basics & Fundamentals: a 5 step approach to ECG interpretation and how to think of differential diagnoses

HPI: A 70-year-old man presents with generalized malaise. He has a history of ESRD and has missed dialysis this week. The following ECG is obtained: Case ECG Before watching…

Weekly Workout March 2, 2015

ECG Basics & Fundamentals: a systemactic approach to ECG interpretation

HPI: A 78-year-old male presents to the ED complaining of generalized weakness. Case ECG

Weekly Workout February 23, 2015

Differential Diagnoses: the biggest reason we miss a diagnosis is that we make a diagnosis, and then stop looking

HPI: An unresponsive 45-year-old male is brought in to your ED by ambulance. His wife found him unconscious at home and called 911. History is otherwise limited. Case ECG

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