Arrhythmias USMLE Step 1 Practice Questions
54 board-style USMLE Step 1 questions in Cardiovascular. Each question shows the correct answer; create a free account for the full explanation and adaptive practice.
- USMLE Step 1 · medium25. A 79-year-old man with atrial fibrillation presents with blood pressure 148/92 mmHg, heart rate 62 bpm, respirations 16/min, and oxygen saturation 98% on room air. He has hypert…
- USMLE Step 1 · medium26. A 72-year-old woman presents with 3 days of fatigue and palpitations. Vital signs show BP 135/82 mmHg, HR 130/min, RR 18/min, temp 37.2°C, SpO2 98% on room air. ECG demonstrates…
- USMLE Step 1 · medium27. A 75-year-old man with hypertension and no prior cardiac history presents with acute palpitations and dyspnea. Vital signs: BP 78/46 mm Hg, HR 160/min, RR 28/min, SpO2 88% on ro…
- USMLE Step 1 · medium28. A 27-year-old man with no prior cardiac history presents with regular narrow-complex tachycardia. Vital signs show HR 180 bpm, BP 95/60 mmHg, RR 20, SpO2 98% on room air. He rec…
- USMLE Step 1 · medium29. A 22-year-old woman develops sudden palpitations while studying. Vitals: BP 118/76, HR 190, RR 18, Temp 37°C, SpO2 98% on room air. She remains hemodynamically stable with norma…
- USMLE Step 1 · medium30. A 79-year-old man takes high-dose beta blockers for coronary disease. He presents with dizziness. ECG shows a heart rate of 42 per minute with narrow QRS complexes and no preced…
- USMLE Step 1 · hard31. A 73-year-old man with hypertension presents with two episodes of unexplained syncope over three months. Vital signs: BP 148/92 mmHg, HR 58 bpm, RR 16, temp 37°C, SpO2 98% on ro…
- USMLE Step 1 · medium32. A 78-year-old man is brought to the emergency department because of recurrent syncope. Pulse is 32 per minute. ECG shows P waves occurring regularly at 80 per minute and QRS com…
- USMLE Step 1 · hard33. A 66-year-old man with anterior wall myocardial infarction presents with acute dizziness. Vital signs show BP 88/56, HR 42, RR 18, SpO2 98% on room air. ECG demonstrates wide QR…
- USMLE Step 1 · medium34. A 70-year-old man is hospitalized for an inferior wall myocardial infarction. On hospital day 1, he develops bradycardia with heart rate of 48 bpm, blood pressure 102/64 mmHg, a…
- USMLE Step 1 · easy35. A 68-year-old man presents for routine evaluation. He reports feeling well with no syncope, palpitations, or dyspnea. Vital signs show BP 138/82 mmHg, HR 72 bpm, RR 16, temperat…
- USMLE Step 1 · medium36. A 63-year-old man undergoes emergent percutaneous coronary intervention for anterior ST-elevation myocardial infarction. One hour post-procedure, telemetry shows a regular wide-…
- USMLE Step 1 · easy37. A 60-year-old man with a history of hypertension presents after sudden collapse following severe substernal chest pain. On arrival, he is unresponsive and pulseless with BP unre…
- USMLE Step 1 · medium38. A 71-year-old man with prior anterior myocardial infarction presents with palpitations and presyncope. Vital signs show BP 88/56, HR 170, RR 22, SpO2 98% on room air. ECG demons…
- USMLE Step 1 · hard39. A 12-year-old boy presents with syncope during soccer practice. Vital signs show BP 110/68 mmHg, HR 82 bpm, RR 16/min, temperature 37°C, and SpO2 98% on room air. Resting ECG an…
- USMLE Step 1 · hard40. A 34-year-old man of Southeast Asian ancestry is brought to the emergency department after an episode of nocturnal syncope. His brother died suddenly at age 30. ECG shows pseudo…
- USMLE Step 1 · medium41. A 58-year-old woman with atrial fibrillation started on sotalol 2 days ago presents with recurrent syncope. Vital signs: BP 92/58, HR 52, RR 18, SpO2 98% on room air. ECG demons…
- USMLE Step 1 · easy42. A 45-year-old man with no prior cardiac history reports intermittent palpitations and sensation of skipped beats, particularly after inadequate sleep. Vital signs: BP 128/82 mmH…
- USMLE Step 1 · medium43. A 74-year-old man with severe COPD hospitalized for acute dyspnea receives albuterol and ipratropium nebulizers. He develops palpitations and dyspnea. Vital signs: BP 142/88, HR…
- USMLE Step 1 · hard44. A 28-year-old man with a history of intermittent palpitations presents with lightheadedness. Vital signs: BP 118/76 mmHg, HR 165 bpm, RR 18, temp 37.2°C, SpO2 98% on room air. E…
- USMLE Step 1 · medium45. A 19-year-old college student presents with recurrent episodes of palpitations (HR 180 bpm, BP 110/70 mmHg, RR 20, SpO2 98% on room air). Between episodes, ECG demonstrates a sh…
- USMLE Step 1 · medium46. A 24-year-old woman comes to the clinic because of recurrent episodes of sudden-onset palpitations that stop abruptly after she bears down or splashes cold water on her face. Sh…
- USMLE Step 1 · easy47. A 67-year-old man comes to the emergency department because of palpitations and mild shortness of breath that began this morning. He has hypertension and coronary artery disease…
- USMLE Step 1 · medium48. A 66-year-old man with prior anterior wall myocardial infarction presents with acute palpitations and near syncope. Vital signs: BP 78/48 mmHg, HR 180 bpm, RR 22, SpO2 92% on ro…