Figure 2From: Inhaled β-agonist does not modify sympathetic activity in patients with COPDScatter plot of change in norepinephrine against change in MSNA. Displayed are changes from visit 1 (week 0) to after salmeterol inhalation at visit 2 (week 4). (r = 0.72; p = 0.01; n = 11).Back to article page