Changes of hemodynamic and cerebral oxygenation after exercise in normobaric and hypobaric hypoxia: associations with acute mountain sickness

Table 1 Parameters measured with noninvasive hemodynamic monitoring using Electrical Cardiometry

	Normobaric hypoxia (hypoxic chamber)			Hypobaric hypoxia (Little Matterhorn summit)
	Munich 520 m	Ascent to simulated 3883 m	Exercise at simulated 3883 m	Munich 520 m	Ascent to 3883 m	Exercise at 3883 m	3883 m after 24 h	3883 m after 24 h and O₂
Cardiac index (l/min/m²)	2.8 ± 0.6	3.0 ± 0.3	3.6 ± 0.50	2.7 ± 0.9	3.0 ± 0.9	3.6 ± 0.8**	3.1 ± 0.7	2.8 ± 0.6
Cardiac output (l/min)	5.2 ± 0.8	5.6 ± 0.5	6.8 ± 0.8	5.0 ± 1.5	5.8 ± 1.6	6.9 ± 1.5	5.8 ± 1.4	5.3 ± 1.2
Stroke volume (ml)	84.3 ± 7.8	85.3 ± 7.6	76.5 ± 8.4	81.4 ± 14.0	74.1 ± 14.0	68.0 ± 10.7*	67.6 ± 13.5*	69.6 ± 13.6
Left ventricular ejection time (ms)	303 ± 27	304 ± 11	267 ± 13	313 ± 12	281 ± 12***	240 ± 16***	264 ± 20***	282 ± 19**
Index of contractility	68.8 ± 20.1	68.2 ± 8.0	53.1 ± 13.8	64.8 ± 22.6	50.0 ± 17.5	45.2 ± 17.1**	44.0 ± 15.2**	45.9 ± 13.6*

Values are presented as mean ± SD. Statistical analysis with one-way repeated-measures ANOVA with Greenhouse-Geisser correction, followed by multiple comparisons with Bonferroni correction for multiple comparisons, *p < 0.05, **p < 0.01, ***p < 0.001 vs. baseline in Munich at 520 m

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