Table 1.

Ventilatory changes after hypoxic exposure

	PaO2, mmHg	PaCO2, mmHg	pH	HCO3−, mmol/l	HVR Slope
Baseline	102.50±3.46	41.75±1.50	7.41±0.003	27.00±0.80	0.49±0.06
Postexposure	111.00±2.97	37.50±1.34*	7.42±0.010	24.67±0.56†	1.32±0.24*

Values are means ± SE. PaO₂, arterial Po₂; PaCO₂, arterial Pco₂; HVR, hypoxic ventilatory response. HVR slope is expressed in liters per minute per 1% fall in O₂ saturation.

^*P < 0.05,

^†P < 0.01 compared with baseline value.