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Download the article PDF: Clinical Image Challenges November 2026
A 29-year-old male presents to urgent care with generalized muscle weakness. His oxygenation is normal on room air, and his blood pressure is 117/72 mm Hg. He denies chest pain, palpitations, or shortness of breath. An ECG is obtained.
View the ECG and consider what your diagnosis and next steps would be. Resolution of the case is described on the next page.
Case presented by Catherine Reynolds, MD, McGovern Medical School at UTHealth Houston.
29-Year-Old With Muscle Weakness
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