ECG Weekly

Weekly Workout · #588 · April 6, 2026

UMEM Cases, Part 2: When the ECG Conceals and When It Reveals

HPI

An 81-year-old woman presents with lightheadedness and marked bradycardia. Her ECG shows more P waves than QRS complexes, but the mechanism is not immediately clear. The key question is whether the PR intervals follow a pattern or whether the atria and ventricles are dissociated.

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