A 47-Year-Old Man Comes to the Emergency Department Due to a 30-Minute

A 47-year-old man comes to the emergency department due to a 30-minute history of sudden-onset severe chest pain and shortness of breath.  He is on an RV road trip with his family and has had pain in and swelling of the left leg for the past 2 days.  The patient has no significant medical history and takes no medications.  Temperature is 37.2 C (99 F) , blood pressure is 90/56 mm Hg, pulse is 124/min, and respirations are 32/min.  Oxygen saturation is 82% on room air.  BMI is 36 kg/m².  ECG shows sinus tachycardia.  Chest x-ray shows no abnormalities. Which of the following is most likely increased in this patient?

A) Functional residual capacity
B) Lung diffusion capacity
C) Physiologic dead space
D) Pulmonary compliance
E) Total airway resistance