Figure 1.
Schematic representation of the sequence of data collection in studies A and B.
SpO2, blood oxygen saturation; PtO2, transcutaneous oxygen partial pressure; PtCO2, transcutaneous CO2 partial pressure; HR, heart rate; BP, blood pressure; RF, respiratory frequency; PAP, pulmonary artery pressure; Vt, tidal volume; VE, minute ventilation; DlCO, pulmonary CO diffusion; VA = alveolar volume; TFC, thoracic fluid content; PetCO2, end tidal CO2 pressure in the exhaled air.
Figure 2.
Changes in SpO2 (upper panel), PtO2 (middle panel) and PtCO2 (lower panel) during slow breathing exercise and recovery.
Differences vs. baseline with p<0.05 are identified with * (Study A) or ° (Study B) symbols. Vertical bars denote 95% CI of the mean.
Table 1.
Study variables assessed at high altitude in baseline condition, after 15 minutes of slow breathing exercise and after 5 and 30 minutes of recovery.