Pulmonary Embolism — Clinical

Which of the following is the most sensitive imaging modality for detecting pulmonary embolism in a haemodynamically stable patient with normal renal function?

In a patient with acute pulmonary embolism, which of the following is the most common electrocardiographic finding?

A 58-year-old man with a history of recent hip fracture surgery presents to the emergency department with acute onset dyspnea, pleuritic chest pain, and tachycardia (HR 110/min). Clinical suspicion for pulmonary embolism is high. His D-dimer is elevated at 2.5 µg/mL. Which investigation is most appropriate to confirm the diagnosis?

A 58-year-old man with acute pulmonary embolism (PE) and haemodynamically stable presentation is admitted to the hospital. He has no contraindications to anticoagulation. What is the drug of choice for initial anticoagulation in this patient?

A 72-year-old woman with a history of atrial fibrillation (not on anticoagulation) and recent hospitalization for pneumonia (discharged 3 days ago) presents with sudden onset dyspnea and syncope. On arrival, vital signs are: BP 88/54 mmHg, HR 118/min, RR 32/min, SpO₂ 85% on room air, JVP elevated at 8 cm H₂O. Bedside echocardiography shows acute right ventricular dilatation with RV/LV ratio >0.9 and McConnell's sign. Troponin I is elevated at 0.15 ng/mL. What is the most appropriate immediate management?