USMLE EXAM PREPARATION

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Question #1 (Topic: Demo Questions)

A 58-year-old man presents with chest pain radiating to his left arm. An ECG shows ST-segment elevation in leads II, III, and aVF. Which coronary artery is most likely occluded?

Left anterior descending artery

Right coronary artery

Left circumflex artery

Left main coronary artery

Correct Answer: B

Question #2 (Topic: Demo Questions)

A patient with hypertension is prescribed lisinopril. Which mechanism best explains how this medication lowers blood pressure?

Blocks beta-1 receptors

Inhibits angiotensin-converting enzyme

Blocks calcium channels

Increases aldosterone secretion

Correct Answer: C

Question #3 (Topic: Demo Questions)

A 72-year-old woman suddenly develops weakness of the right arm and leg, along with difficulty speaking. Symptoms began 45 minutes ago. What is the most appropriate initial diagnostic imaging study?

Brain MRI with contrast

Noncontrast CT scan of the head

Lumbar puncture

Carotid ultrasound

Correct Answer: B

Question #4 (Topic: Demo Questions)

A 24-year-old woman presents with weight loss, heat intolerance, palpitations, and a fine hand tremor. Laboratory testing reveals low TSH and elevated free T4. What is the most likely diagnosis?

Hypothyroidism

Hyperthyroidism

Addison disease

Cushing syndrome

Correct Answer: B

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