Core
Results:
High-Risk Pulmonary Embolism
Key Points: The ECG can provide early clues to high-risk PE and may identify patients at risk for rapid hemodynamic collapse. Right ventricular strain patterns are the core high-risk markers….
Pacemaker & ICD Emergencies
Key Points: Three primary pacemaker malfunctions: Failure to pace – no pacing spike when one is needed. Failure to capture – pacing spike appears but no depolarization follows. Failure to…
Himalayan T Waves
Key Points Tall, broad-based T–U fusion that looks like a mountain peak, usually from severe hypokalemia; think high torsades risk until proven otherwise. Hallmark is prolonged repolarization: QT appears long…
Pediatric ECG Red Flags
Key Points Any wide QRS (>90 ms) in an infant or small child is abnormal and should trigger evaluation for VT, sodium-channel blockade, or conduction disease. QTc >450 ms in…
Pediatric ECG in Cardiac Arrest
Key Points ECG rhythms in pediatric arrest differ from adults. Pulseless arrest in children is most often asphyxial, but ECG clues can reveal reversible metabolic, toxicologic, or structural causes. Wide…
Pediatric ECG: Basics
Key Points Pediatric ECGs are not scaled-down adult ECGs. Right axis deviation, large R waves in V1, and T wave inversions in V1 to V3 are expected in healthy children….
Pseudo-Wellens Waves
Key Points: Pseudo-Wellens waves are anterior T-wave patterns that mimic the biphasic or deeply inverted T waves of true Wellens syndrome but are caused by non-LAD, non-ischemic physiology. These normal-variant…
Wellens Waves
Key Points Wellens waves are anterior precordial T wave abnormalities (biphasic or deeply inverted) most often in V2–V3, occasionally extending to V1 and V4–V6. They signal a high likelihood of…
Wellens Syndrome
Key Points: Clinical diagnosis, not an ECG pattern alone. Wellens syndrome requires the characteristic ECG findings plus the appropriate clinical scenario. Morphology alone is insufficient and high-risk if misapplied. Critical…
Torsade de Pointes (TdP)
Key Points Definition: TdP is a specific subtype of polymorphic ventricular tachycardia associated with a prolonged QTc interval. It often presents with a “twisting” pattern on ECG but can be…
Ventricular Tachycardia (VT): Core Overview
Key Points VT is a ventricular-origin rhythm: ≥3 consecutive ventricular beats, QRS >120 ms, rate usually 120–250 bpm. Types include monomorphic VT, polymorphic VT, torsades (PMVT with long QT), ventricular…
Ventricular Tachycardia (VT) Mimics
Key Points: Initial Assumption: Any wide (QRS >120 ms), regular tachycardia should be considered ventricular tachycardia (VT) until clearly proven otherwise. VT Characteristics: VT generally has a ventricular rate of…
Pulseless Ventricular Tachycardia (pVT) Arrest
Key Points: Defibrillation First, Minimal Pauses: pVT is rapidly fatal without immediate shocks and high‑quality CPR. Charge defibrillator during compressions and resume compressions immediately after each shock. pVT is a…
Shark Fin “Massive STEMI” Pattern
Key Points: High-risk STEMI morphology caused by fusion of the terminal QRS, J point, ST segment, and T wave into a single “triangular” deflection. Often massive apparent STE with loss…
Prominent Upright T Wave in V1
Key Points: Normal T Wave in V1: The normal ECG typically shows a flat or inverted T wave in lead V1 in sinus rhythm. An upright T wave in V1 can…
Premature Atrial Complexes (PACs)
Key Points PACs are early atrial depolarizations from an ectopic focus that create a premature P wave with a different morphology and axis than the sinus P wave, usually followed…
Electrical Storm
Key Points: Definition: Electrical storm is defined as three or more episodes of sustained ventricular tachycardia (VT), ventricular fibrillation (VF), or appropriate implantable cardioverter-defibrillator (ICD) shocks within 24 hours. Some…
Pulseless Electrical Activity (PEA) Arrest
Key Points: Definition: Organized electrical activity on ECG without a palpable pulse. PEA is a non-shockable arrest rhythm requiring CPR, epinephrine, and identification of reversible causes. Confirmation: Verify in two…
Asystole (Cardiac Arrest)
Key Points: Definition: Asystole is a non-shockable cardiac arrest rhythm characterized by absence of ventricular electrical activity. Treat with high-quality CPR, epinephrine every 3–5 minutes, and an urgent search for…
Ventricular Fibrillation (VF) Arrest
Key Points: Defibrillation First, Minimal Pauses: VF is rapidly fatal without immediate shocks and high‑quality CPR. Charge during compressions and resume compressions immediately after each shock. Chaotic Electrical Activity: VF…
ECG Tags
- A-Z
- ACS Mimics
- ACS-OMI
- Activation
- Advanced Level Curriculum
- Annual ECG Competition
- Anterior OMI
- Anterior STEMI
- Approach
- Arrest
- Arrhythmia
- Arrhythmogenic Cardiomyopathy
- Artifact
- ARVC
- ARVD
- Atrial Parasystole
- Attending
- AV Block
- aVF
- aVL
- aVR
- Axis
- Basics
- Board Review
- Bradyarrhythmia
- Chest Pain
- Clumped Beats
- Conduction
- Core
- Core Level Curriculum
- Critical ECG Patterns
- Curriculum
- DDx
- Delta
- Devices
- Diagonal Branch Occlusion
- Differential Diagnoses
- Diffuse ST Elevation
- Documentation
- Early Repolarization
- ECG Interpretation
- ECG Localization
- ECG Variant
- Education/Teaching
- Electrolytes
- Emergencies
- Emergent Cath Lab Activation
- EMS
- Expert Level Curriculum
- Foundations Level Curriculum
- Guidelines
- High-Lateral STEMI
- Hub
- Hyperacute T waves
- Hypercalcemia
- Hyperkalemia
- Hypermagnesemia
- Hypocalcemia
- Hypokalemia
- Hypomagnesemia
- Hyponatremia
- Hypothermia
- I
- II
- Index
- Inferior OMI
- Inferior STEMI
- Intervals
- Irregular
- Ischemia
- Ischemia & Infarction
- J Waves
- JT
- Juvenile T wave
- LAD Occlusion
- Lateral STEMI
- LBBB
- LCx Occlusion
- Lead Placement
- Life Savers
- LV an
- LV Aneurysm
- Mastery Level Curriculum
- Metabolic
- Mimics
- Morphology
- Narrow QRS
- Occlusion MI
- OMI Pattern
- Orthodromic AVRT
- Osborn Waves
- P Wave
- Paced Rhythms
- Pacemaker/ICD
- Paramedics
- Pauses
- PE
- Pediatrics
- Pericardial
- Pericarditis
- PGY-1
- PGY-2
- PGY-3
- PGY-4
- Post-Cardiac Arrest
- Posterior Extension
- Posterior MI
- Posterior STEMI
- PR
- Preexcitation
- Premature Complexes
- Prolonged QT
- Pulmonary Embolism
- Pulse-Tapping Artifact
- PVCs
- Q Wave
- QRS
- QT
- R Waves
- RAD
- Rate
- RBBB
- RCA Occlusion
- Regular
- Reperfusion
- Rhythm
- RR
- S Waves
- Segments
- Seizure
- Serial ECGs
- Sgarbossa
- Shock
- South African Flag Sign
- ST
- ST Depression
- ST Elevation
- STEMI
- STEMI Equivalent
- STEMI Mimics
- STEMI Negative OMI
- Stepwise
- Stroke
- Structural
- Students
- SVT
- Syncope
- T Wave Inversion
- T Waves
- Tachyarrhythmia
- Tachycardia
- Tamponade
- Terminal QRS Distortion
- Toxicology
- TP
- Traditional STEMI Criteria
- U Waves
- Unstable
- V1-V4
- V2
- V5
- V6
- Vectors
- Ventricular Repolarization
- Ventricular Rhythms
- Ventricular Tachycardia
- Voltage
- Waveforms
- Wide QRS
- Workflow
- WPW
© 2026 ECG Weekly. All rights reserved. | Terms of Use | Privacy Policy
Powered by the member(dev) platform
Loading...