FIGURE 6. Significant bronchodilator response, the post-bronchodilator FEV1 has increased more than 12% and 200 mL and is >LLN. The flow–volume loop overlay shows higher flows and volumes after bronchodilator (red tracing). FVC, forced vital capacity; FEV1, forced expiratory volume in the first second; FEV3, forced expiratory volume in the third second; M, median; LLN, lower limit of normal.
