Fig. 3
Hemodynamic variables in normobaric (hypoxic chamber; n = 7) and hypobaric (Little Matterhorn summit; n = 11) hypoxia. Statistical analysis using one-way repeated-measures ANOVA with Greenhouse-Geisser correction, followed by multiple comparisons with Bonferroni correction. a Changes in heart rate (HR; min− 1). b Changes in mean arterial pressure (MAP; mmHg). c Changes in left ventricular ejection time (LVET; ms). d Changes in cardiac index (CI; l/min/m2). * p < 0.05, ** p < 0.01, *** p < 0.001 vs. baseline in Munich at 520 m; ° p < 0.05, °° p < 0.01, °°° p < 0.001 vs. prior time point; x p < 0.05 between corresponding time points in hypobaric and normobaric hypoxia (n = 7)