Review Question - QID 214652

A 22-year-old woman on oral contraceptive pills presents to the emergency department for chest pain. She states that the pain is worse with deep breaths and has persisted for the past 10 hours. The patient is otherwise healthy and does not smoke. Her temperature is 99.2°F (37.3°C), blood pressure is 120/85 mmHg, pulse is 102/min, respirations are 16/min, and oxygen saturation is 95% on room air. Physical exam reveals a healthy young woman with clear breath sounds and non-tender lower extremities. The pain is reproduced with deep breaths and when the patient stretches her chest wall. Laboratory studies are ordered as seen below.

Serum:
Na+: 138 mEq/L
Cl-: 100 mEq/L
K+: 3.9 mEq/L
HCO3-: 24 mEq/L
BUN: 20 mg/dL
Glucose: 88 mg/dL
Creatinine: 1.0 mg/dL
Ca2+: 10.2 mg/dL
D-dimer: 800 ng/mL (normal < 500 ng/mL)
Troponin: < 0.01 ng/mL
hCG: undetectable

While in the emergency department the patient’s chest pain improves with acetaminophen, and her pulse is 80/min after 1L of IV fluids. Which of the following is the most appropriate next step in management?