1. Autonomic cardiac control with xenon anaesthesia in patients at cardiovascular risk 
J.-H. Baumert, M. Hein, K.E. Hecker, S. Satlow, J. Schnoor, R. Rossaint 
British Journal of Anaesthesia 
Volume 98, Issue 6, Pages (June 2007)
DOI: /bja/aem083
Copyright © 2007 British Journal of Anaesthesia Terms and Conditions

2. Fig 1
Total power of the heart rate variability spectrum between and 0.4 Hz (ms2) at baseline anaesthesia (base) and after 30 and 60 min of xenon (clear boxes) or propofol (dotted boxes) anaesthesia; medians (black line) inter-quartile range (box) and range (whiskers); n = 13 patients per group; *P < 0.05 compared with the xenon group, anova with Bonferroni’s post-test.
British Journal of Anaesthesia  , DOI: ( /bja/aem083)
Copyright © 2007 British Journal of Anaesthesia Terms and Conditions

3. Fig 2
LF ratio [ratio of the power in the low (LF) to the high (HF) frequency bands]; medians, inter-quartile range, and range of n = 13 patients per group; *P = 0.04 for interaction of group allocation and time, GLM procedure; see Figure 1 for further explanations.
British Journal of Anaesthesia  , DOI: ( /bja/aem083)
Copyright © 2007 British Journal of Anaesthesia Terms and Conditions