pulmonary-embolism
A 62-year-old man is post-operative day 5 following a cemented total hip arthroplasty. He develops sudden-onset dyspnea with oxygen saturation of 88% on room air. Heart rate is 115 bpm, blood pressure 135/85 mmHg. ECG shows sinus tachycardia with S1Q3T3 pattern. D-dimer returns elevated at 4200 ng/mL. He is on enoxaparin 40mg daily for VTE prophylaxis. **What is the MOST appropriate next investigation?**
Mark each as TRUE or FALSE
Lower limb venous duplex ultrasound
CT pulmonary angiography (CTPA)
Ventilation-perfusion (V/Q) scan
Transthoracic echocardiography
Repeat D-dimer in 24 hours
Answer the questions to see explanations
Click T (True) or F (False) for each option