USMLE-Rx Step 1 Qmax Challenge #4122

Check out today’s Step 1 Qmax Question Challenge.

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USMLE-Rx Step 1 Qmax Challenge #4122A 23-year-old man presents to the emergency department complaining of an unsteady heart beat. A prolonged QT interval is noted. The patient loses consciousness 30 minutes later, and a repeat ECG is done, which is shown in the image.

Drugs used to treat which of the following protozoal infections are associated with this cardiac problem?

A. Giardia lamblia
B. Plasmodium falciparum
C. Pneumocystis jirovecii
D. Trichomonas vaginalis
E. Trypanosoma cruzi


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9 thoughts on “USMLE-Rx Step 1 Qmax Challenge #4122”

  1. We think that the answer is B. The patient got long QT leading to V-tach from an anti-malarial drug.

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