Review Question - QID 213802

A 45-year-old woman presents to the emergency department with chest pain and shortness of breath. Her symptoms started after she returned from a business trip to China. She states deep breaths cause her pain. She has a past medical history of obesity, menorrhagia, and anxiety and is currently taking lisinopril, metformin, oral contraceptive pills, and fluoxetine. The patient is also concerned that she may have syphilis as she engaged in sexual intercourse with a new partner recently. She also believes she has a concussion as she has had headaches intermittently over the past year and recalls falling and hitting her head. She recently recovered from a respiratory infection that presented with a cough and a low-grade fever. Her temperature is 98.4°F (36.9°C), blood pressure is 135/84 mmHg, pulse is 110/min, respirations are 21/min, and oxygen saturation is 94% on room air. Cardiopulmonary exam reveals clear breath sounds and a rapid, regular heart rate. Initial laboratory values are ordered as seen below.

Hemoglobin: 9.0 g/dL
Hematocrit: 30%
Leukocyte count: 4,500/mm^3 with normal differential
Platelet count: 199,000/mm^3

Serum:
Na+: 140 mEq/L
Cl-: 99 mEq/L
K+: 4.4 mEq/L
HCO3-: 24 mEq/L
BUN: 27 mg/dL
Glucose: 144 mg/dL
Creatinine: 1.5 mg/dL
D-dimer: 675 mcg/L (normal < 500 mcg/L)
Troponin: 0.6 ng/mL (normal < 0.4 ng/mL)
Ca2+: 10.1 mg/dL

Which of the following is associated with the most likely diagnosis?