Which combination best indicates a pulmonary embolism?

• A. Sudden onset dyspnea with pleuritic chest pain and tachycardia
• B. Gradual onset cough with fever
• C. Painless chest tightness on exertion
• D. Chronic productive cough with wheezing

Answer: (A)

Pulmonary embolism most often shows up as an abrupt onset of shortness of breath accompanied by sharp, pleuritic chest pain and a fast heart rate. The sudden dyspnea comes from a clot blocking part of the pulmonary circulation, causing ventilation-perfusion mismatch and hypoxemia, while pleuritic pain arises from irritation of the pleura overlying the affected lung. The rapid pulse is a common early response to the drop in oxygen delivery. The other patterns fit better with different problems: gradual cough with fever points to an infection like pneumonia; painless chest tightness on exertion can lean toward angina or other cardiac issues rather than a pulmonary event with pleuritic pain; chronic productive cough with wheezing suggests a chronic lung disease such as COPD or asthma. So the combination of sudden dyspnea, pleuritic chest pain, and tachycardia most strongly indicates a pulmonary embolism.