A 53-Year-Old Man Is Being Evaluated for Dyspnea

A 53-year-old man is being evaluated for dyspnea.  The graph on the right shows how the patient's work of breathing varies with respiratory rate, whereas the graph on left represents the work of breathing versus respiratory rate in a normal individual.  The minute ventilation is constant and equal in both graphs. Which of the following is the most likely diagnosis in this patient?

A) Alpha-1 antitrypsin deficiency
B) Anxiety disorder
C) Asthma
D) Goiter
E) Pulmonary fibrosis

Correct Answer:

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