Killer Differentials
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Wide QRS Bradyarrhythmia: DDx
Key Point Wide QRS bradycardias usually reflect infranodal conduction disease (His–Purkinje or below), making them much more dangerous than narrow QRS bradycardias. These rhythms often lead to hemodynamic instability and…
T Wave Inversion in V1-V3 DDx
Key Points Common Misconception: T-wave inversions (TWIs) in V1–V3 are often prematurely labeled as “anteroseptal ischemia,” but there’s a much broader differential. Essential Differentials: Pulmonary causes (e.g., PE), Arrhythmogenic RV…
STEMI vs LVH: DDx
Key Points: Left ventricular hypertrophy (LVH) with strain is one of the most common and dangerous STEMI mimics, particularly in the anterior leads, and is a frequent cause of false-positive…
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