1. Representative diaphragm electromyogram (EMG) tracings at rest (a and b) and during maximum voluntary ventilation (c and d) in a healthy subject (a and c) and in a severe chronic obstructive pulmonary disease patient (b and d).
Representative diaphragm electromyogram (EMG) tracings at rest (a and b) and during maximum voluntary ventilation (c and d) in a healthy subject (a and c) and in a severe chronic obstructive pulmonary disease patient (b and d). Relationship between diaphragm EMG (as a percentage of the maximum; EMGdi % max) and e) forced expiratory volume in 1 s (FEV1; r2 = 0.4; p<0.001) or f) vital capacity (r2 = 0.61; p<0.001). Reproduced and modified from [68] with permission from the publisher.
A. Bourdin et al. Eur Respir Rev 2009;18:
©2009 by European Respiratory Society