Core

ECG STAT April 20, 2025

Precordial Swirl: OMI Pattern

Key Points Definition: The precordial swirl sign refers to a rotational pattern of ST-segment abnormalities across the precordial leads, suggesting a dynamic and evolving occlusion myocardial infarction (OMI). It is…

ECG STAT April 14, 2025

Unifasicular Block

Key Points Definition: Unifascicular block refers to conduction delay or interruption in a single fascicle of the ventricular conduction system: the right bundle branch (RBB), left anterior fascicle (LAF), or…

ECG STAT April 11, 2025

Pulmonary Embolism (PE)

Key Points ECG Findings in PE: No single ECG pattern is diagnostic of acute PE, and ECG findings are typically nonspecific. However, certain ECG patterns, especially those indicating right heart…

ECG STAT April 11, 2025

QRS Voltage: Basics

Key Points: Definition: QRS voltage represents the amplitude (height) of the QRS complex on ECG, reflecting ventricular electrical activity during depolarization. High Voltage: Increased QRS voltage typically indicates ventricular hypertrophy—most…

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 February 28, 2025

EMS ECGs in Acute Coronary Syndromes (ACS)

Key Points for EMS Providers: You are the first critical link in the chain of survival for ACS patients—your actions set the course for their care, directly impacting time to…

ECG STAT January 17, 2025

Subtle ST Segment Elevation: OMI Pattern

Key Points: ACS Dynamics: Occluded arteries in ACS can spontaneously reperfuse and reocclude, making ECG findings variable. Limitations of Computer Interpretation: Subtle STE is often missed by computerized ECG interpretation;…

ECG STAT January 11, 2025

Brugada Syndrome (BrS)

Key Points: Life-Threatening Sodium Channelopathy: Predisposes to ventricular arrhythmias (VF/VT) and sudden cardiac death (SCD), often in otherwise “healthy” hearts. When to Suspect BrS: Patients with syncope, unexplained “seizures,” ventricular…

ECG STAT January 6, 2025

Hypokalemic Periodic Paralysis

Key Points Definition: A rare ion channelopathy that causes sudden, reversible episodes of symmetric flaccid paralysis triggered by low serum potassium. It may be inherited or secondary to thyrotoxicosis or…

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