Please click here to obtain permission to reproduce this image.
Click on image to view larger version.
Figure 4 Heart rate and blood pressure (BP) variability. There was a differential effect of angiotensin-converting enzyme genotype on both the low- and high-frequency (units normalized to overall power; LFnu, HFnu) components of BP variability (A and B) and an overall significant enhancement of the sympathovagal balance in participants homozygous for the deletion allele. (C) In addition, there was a more dramatic increase (from a lower initial value) in these individuals in the baroreceptor effectiveness index (BEI). (D) Shown are raw tracings for one competitor (heart rate variability [HRV] is signified by upper tracings, blood pressure variability [BPV] by lower tracings) illustrating the strongest overall signals (decrease in very low frequency component of BPV, increase in low- and high-frequency; increase in very low frequency component of HRV). dBP = diastolic blood pressure; RRI = R-R interval.
|
