Pulmonary Embolism Clinical Questions USMLE Type
🫁 Pulmonary Embolism — 20 Advanced USMLE-Style Clinical Vignettes
Balanced mix: Diagnosis & Risk Stratification (10) + Management & Therapy (10). Click any option to reveal the correct answer and detailed explanation.
🫁 Pulmonary Embolism — 20 Advanced USMLE-Style Clinical Vignette MCQs
Balanced focus on Diagnosis, Risk Stratification, and Management | Interactive & Mobile Responsive
1. A 52-year-old man presents with sudden dyspnea after a long flight. HR 112, SpO₂ 90%. What is the most appropriate initial diagnostic test?
2. A 60-year-old postoperative woman develops acute dyspnea and hypotension. ECG shows S1Q3T3. Which echo finding supports massive PE?
3. A 45-year-old woman on oral contraceptives has CTPA-confirmed bilateral segmental PE, hemodynamically stable. Next best step?
4. A 30-year-old man with syncope, hypotension, and dilated RV on echo. What is the next management step?
5. A 67-year-old woman with DVT and dyspnea. Which tool estimates PE probability before imaging?
6. A 40-year-old man with PE is started on warfarin. What is the minimum overlap duration with LMWH?
7. In PE, what ECG finding correlates with RV strain?
8. What is the preferred anticoagulant in pregnancy with PE?
9. A 72-year-old man with massive PE and contraindication to thrombolysis. Next management step?
10. Which biomarker is most useful for risk stratification in PE?
11. A patient with submassive PE is started on anticoagulation. After 48 hours, he deteriorates hemodynamically. Next step?
12. What duration of anticoagulation is recommended after first provoked PE?
13. Which of the following is a contraindication to thrombolytic therapy in PE?
14. Which CTPA finding is most specific for PE?
15. A 58-year-old male with unprovoked PE. What additional test should be considered?
16. In PE, which feature distinguishes massive from submassive PE?
17. What is the primary mechanism of death in untreated massive PE?
18. A patient with acute PE has creatinine clearance (CrCl) 22 mL/min. Which anticoagulant is preferred initially?
19. A patient had PE provoked by major knee surgery and completed 3 months of anticoagulation. What is the usual recommendation?
20. A patient develops recurrent PE despite therapeutic warfarin (INR in target range). What is the best next approach?
🫁 Pulmonary Embolism Clinical Questions — USMLE Type Advanced Level
20 Case-Based MCQs with Explanations | Diagnostic & Management Pearls | USMLE Step 2 CK / Step 3 / NEET-SS / MRCP
1. A 48-year-old woman presents with sudden dyspnea and pleuritic chest pain two days post-cesarean section. She is tachycardic but normotensive. ECG shows sinus tachycardia. What is the best initial diagnostic test?
2. Which ECG finding most strongly supports acute pulmonary embolism?
3. A patient presents with PE confirmed on CTPA. He is hemodynamically stable. Which of the following initial treatments is most appropriate?
© 2025 MedicalPrep | Pulmonary Embolism Advanced Clinical MCQs for USMLE / NEET-SS / MRCP. Pulmonary Embolism MCQs, USMLE Step 2 CK, Step 3, Clinical Vignettes, CTPA, Wells Score, Thrombolysis in PE, Anticoagulation.
💡 Important FAQs on Pulmonary Embolism — Quick Review
1️⃣ What are the classic symptoms of pulmonary embolism (PE)?
Sudden-onset dyspnea, pleuritic chest pain, cough, and hemoptysis are classic. Syncope, tachypnea, or unexplained hypoxia may also occur. Remember: symptoms are often nonspecific, so clinical suspicion is key.
2️⃣ What is the most common ECG finding in PE?
Sinus tachycardia is the most frequent finding. S1Q3T3 pattern and right axis deviation indicate acute right heart strain but occur in fewer than 20% of cases.
3️⃣ How does the Wells Score help in PE diagnosis?
The Wells Score stratifies patients into low, intermediate, or high pretest probability. – <2 → Low probability (consider D-dimer first) – 2–6 → Intermediate – >6 → High probability (proceed directly to imaging)
4️⃣ When is D-dimer testing useful?
D-dimer is most valuable when PE probability is low or intermediate. A negative D-dimer can effectively exclude PE in these cases. It’s not useful in high pretest probability situations or postoperative patients (false positives).
5️⃣ What imaging modalities confirm PE?
CT Pulmonary Angiography (CTPA) is the gold standard. V/Q scan is an alternative if CTPA is contraindicated (e.g., renal failure, contrast allergy, pregnancy).
6️⃣ What defines massive vs. submassive PE?
Massive PE: Hypotension (SBP <90 mmHg for >15 min) or shock. Submassive PE: Normal BP but RV dysfunction or myocardial injury (↑ troponin/BNP, echo signs).
7️⃣ What is the immediate treatment for hemodynamically stable PE?
Start anticoagulation — LMWH or DOAC (e.g., apixaban, rivaroxaban). Thrombolysis is reserved for unstable (massive) PE.
8️⃣ When is systemic thrombolysis indicated?
Indicated in massive PE with shock or sustained hypotension. Not routinely used in stable or submassive PE unless deterioration occurs.
9️⃣ What is the duration of anticoagulation after PE?
✅ 3 months for provoked PE (e.g., surgery, trauma)
✅ ≥6 months or indefinite for unprovoked or recurrent PE
🔟 When should an IVC filter be used?
Reserved for patients with PE or DVT who have an absolute contraindication to anticoagulation or recurrent PE despite adequate therapy.
11️⃣ What biomarkers suggest right heart strain?
Elevated troponin and BNP reflect RV strain and correlate with increased mortality risk.
12️⃣ What are the echo findings in PE?
Right ventricular dilation, hypokinesis, McConnell sign (RV free wall akinesia with preserved apex motion), and flattening of the interventricular septum (“D-sign”).
13️⃣ How do DOACs compare to warfarin for PE?
DOACs (apixaban, rivaroxaban, edoxaban, dabigatran) are equally effective and safer (less intracranial bleeding). Warfarin remains preferred in renal failure or valvular disease.
14️⃣ What is the recurrence risk after unprovoked PE?
Approximately 10% at 1 year and up to 30% by 10 years without continued anticoagulation. Hence, consider extended therapy in unprovoked cases.
15️⃣ What preventive measures reduce PE risk post-surgery?
Early ambulation, pneumatic compression devices, and pharmacologic prophylaxis (LMWH or low-dose UFH) in high-risk surgical patients.
Keywords: Pulmonary Embolism FAQs, USMLE Quick Review, PE Management, Wells Score, Thrombolysis, Anticoagulation, VTE, NEET SS Pulmonology.
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