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Fig. 4 | Respiratory Research

Fig. 4

From: Impact of High-Intensity-NIV on the heart in stable COPD: a randomised cross-over pilot study

Fig. 4

Summed EMG activity of the intercostal muscles and diaphragm during spontaneous breathing and under NIV. EMG during spontaneous breathing is shown in the filled areas and under NIV in the dashed areas. Data are presented as median (IQR). EMGAR: EMGactivity ratio: activity during NIV/activity during SB. An EMGAR of 0.66 means a 1.5 fold decrease in EMG activity under LI-NIV vs. SB, an EMGAR of 0.52 means a 1.9 fold decrease in EMG activity under HI-NIV vs. SB. The EMGARs did not differ significantly. *: P < 0.01, depicting a significant decrease in SB respiratory muscle activity after 6 W HI-NIV compared to baseline SB

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