Repeated USMLE Questions Step 1- Review- 92

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Q- A 55-year-old male presents to the ER with sudden-onset severe chest pain radiating to the left arm. He appears diaphoretic and anxious. His blood pressure is 90/60 mm Hg, heart rate is 110/min, and respiratory rate is 24/min. An electrocardiogram (ECG) reveals ST-segment elevation in leads II, III, and aVF.

Which of the following arteries is most likely occluded?

A- Left anterior descending artery

B- Left circumflex artery

C- Left main coronary artery

D- Right coronary artery

D- Right coronary artery- ST-segment elevation in leads II, III, and aVF indicates an inferior wall myocardial infarction. The right coronary artery supplies the inferior wall of the heart. Therefore, occlusion of the right coronary artery is the most likely cause of the patient’s symptoms.



Q- Which one of the following transmitters is primarily associated with mood regulation, sleep, and appetite?

A- Acetylcholine

B- Dopamine

C- GABA (Gamma-Aminobutyric Acid)

D- Serotonin

D- Serotonin- It plays a key role in mood regulation, sleep, and appetite. Imbalance in serotonin levels may lead to depression, anxiety and eating disorders.



Q- A patient with a history of peptic ulcer is prescribed a nonsteroidal anti-inflammatory drug (NSAID) for the management of osteoarthritis.

Which one of the following medications should be prescribed to reduce the risk of gastric ulcers?

A- Metoclopramide

B- Misoprostol

C- Omeprazole

D- Ranitidine

B-Misoprostol- Misoprostol is a synthetic prostaglandin E1 analog that has cytoprotective effects on the gastric mucosa. When prescribed with NSAIDs, it helps reduce the risk of NSAID-induced gastric ulcers by promoting mucosal protection and inhibiting acid secretion.



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