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16
Inverted P Waves in V1: DDx
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Flutter
Waves
(F
waves
): Basics
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Approach to Tachydysrhythmias
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Curriculum: Expert Level
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Must-Know Differentials (DDx) Hub
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Atrial Fibrillation with RVR
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Asystole (Cardiac Arrest)
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Altered Mental Status Emergencies
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First-Degree AV Block
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Curriculum: Mastery & Teaching Level
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Post-Arrest No STEMI: When Cath Can Wait
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Hypokalemia Emergencies
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Abnormal P Wave Axis: DDx
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QRS Voltage: Basics
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Acquired Long QT Syndrome
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Abnormal STAT ECGs
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Weekly Workouts
15
#607
UMMC Cases Part III: When T Waves Help Tell the Story
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#605
UMMC Cases Part I: Three ECGs That Reward a Second Look
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#603
ECG Hallucinations: When Irregular Is Not Atrial Fibrillation
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#597
2026 ECG Competition Answers (Part 4)
…ST depression, especially in V4-V6, with upright terminal T waves This is an occlusion pattern, not a benign abnormality. It should prompt concern for an acute …
#596
2026 ECG Competition Answers (Part 3)
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#595
2026 ECG Competition Answers (Part 2)
Video Moments
2
#542
Recent University of Maryland Medical Center Cases (Part II)
▶ at 1:40
…exactly what we're talking about. This is Welland's sign or Welland's
waves
as I learned to call it Welland's
waves
by the great Henry Marriott from whom I learned by reading his textbooks Welland's w…
#540
Optical Illusions and 12-Lead ECGs: How First Impressions Can Mislead
▶ at 3:14
…body left their shutter open for a half second or so and so the ocean
waves
look a little bit blurred by the way if you ever want to take a blurred wave photo that's how you do it you put your camera …
…. As the left ventricle matures and becomes dominant, the T waves in V2 and V3 usually become upright. In some adults, this juvenile pattern persists. Important…
#594
2026 ECG Competition Answers (Part 1)
… similar appearance. The key maneuver is to march out the P waves . In this case, the P-P interval is fairly regular, arguing against PACs as the explanation. T…
#588
UMEM Cases, Part 2: When the ECG Conceals and When It Reveals
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#570
ST Elevation and Biphasic T Waves in a Young Man: Wellens, Anterior STEMI, or Something Else?
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#569
Not Cerebral T Waves: The Beat-to-Beat Warning You Cannot Miss
…d QT prolongation. Many clinicians would suspect cerebral T waves and immediately send her for head CT. However, another dangerous abnormality present on the EC…
#567
Recent ECG Case Highlights from the University of Maryland (Part II)
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#559
Not Your Usual STEMI: High Voltage and Narrow Q Waves
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#546
2025 ECG Competition Answers (Part 3/3)
… a RBBB morphology. 13. Describe (or draw) what de Winter T waves are, in which leads you find them, and what they predict in the cath lab. (3 points) Question …
#545
2025 ECG Competition Answers (Part 2/3)
…ing for here is dx-hypothermia; hypothermia ECG findings: J waves, tremor artifact, sinus tachy (early), bradycardia (sinus, junctional, or slow afib), prolonga…
#524
Hyperacute T Waves: Distinguishing Early MI from Other Big T Wave Abnormalities
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