Quiz: Airflow, Lung Volumes, and Flow-Volume Loop
Question 1 of 3  

Which of the following confirms the diagnosis of asthma or airway hyperresponsiveness? 

  • A.

    Exercise-induced bronchospasm in which FEV1 or FVC is ≥ 15% after exercise.

  • B.

    Improvement of FEV1 and FEV1/FVC by ≥ 12% or 200 mL with the administration of a bronchodilator.

  • C.

    At least a 20% drop in FEV1 from baseline (PC20) after provocative testing with methacholine, a nonspecific bronchial irritant.

  • D.

    Eucapnic voluntary hyperventilation (EVH) showing a marked decrease in FEV1.

Am I correct?