Compliance — MCQs

A 57-year-old man comes to the physician because of a 2-year history of fatigue, worsening shortness of breath, and a productive cough for 2 years. He has smoked 1 pack of cigarettes daily for the past 40 years. Examination shows pursed-lip breathing and an increased anteroposterior chest diameter. There is diffuse wheezing bilaterally and breath sounds are distant. Which of the following parameters is most likely to be decreased in this patient?

A 51-year-old man comes to the physician because of progressive shortness of breath, exercise intolerance, and cough for the past 6 months. He is no longer able to climb a full flight of stairs without resting and uses 3 pillows to sleep at night. He has a history of using cocaine in his 30s but has not used any illicit drugs for the past 20 years. His pulse is 99/min, respiratory rate is 21/min, and blood pressure is 95/60 mm Hg. Crackles are heard in both lower lung fields. An x-ray of the chest shows an enlarged cardiac silhouette with bilateral fluffy infiltrates and thickening of the interlobar fissures. Which of the following findings is most likely in this patient?