Normotensive OB children exhibited significantly reduced baroreflex sensitivity, parasympathetic control as well as increased sympathetic control when compared with healthy, NO controls. Findings in this investigation raise the awareness that autonomic dysfunction is present in young OB normotensive children.

No abstract

Measuring heart rate recovery (HRR) holds valuable cardiovascular information and requires minimal technical skill and cost. Understanding the associations between HRR and more robust cardiovascular indicators, such as central systolic blood pressure (CSBP), can provide valuable cardiovascular information with less involvement. CSBP is a strong predictor of certain cardiovascular diseases. The study aims to examine the association between measures of HRR and CSBP and the augmentation index (AIx) in a group of young, healthy individuals and based on sex. Participants and Methods: One-hundred and seven participants (men -55, women -52) were measured for HRR at one minute (HRR 1 ) and two minutes (HRR 2 ) after maximum oxygen consumption (VO 2max ) testing, CSBP, and the AIx at a heart rate of 75 beats•min −1 (AIx@75).

Purpose: Aortic augmentation index (AIx) and cardiovagal tone (CVT) are indicators of cardiovascular health. Associations between these variables provide information about their roles in cardiovascular disease. However, evaluating these associations from a gender perspective and gaining an understanding of the relationship between cardiorespiratory fitness and AIx based on gender can provide additional information. Therefore, we examined the relationships between CVT, measured as the log transformed high-frequency power of R-R intervals from electrocardiogram measurements (lnHF R-R ); cardiorespiratory fitness, measured as maximum oxygen consumption (VO 2 max); and AIx at a heart rate of 75 beats•min -1 (AIx@75). We hypothesized that the relationships between CVT, cardiorespiratory fitness, and AIx@75 would differ based on gender. Methods: We examined the associations between lnHF R-R , VO 2 max, and AIx@75 in 41 women and 39 men. Power spectral density analysis of heart rate variability determined lnHF R-R , radial tonometry determined AIx@75 and the Bruce Treadmill Protocol determined VO 2 max. Results: In men, lnHF R-R positively correlated with and significantly predicted AIx@75 (P = 0.005) but not in women (P = 0.49). For every unit increase in lnHF R-R , there was a 4.6 unit increase in AIx@75 in men versus a 1.0 unit increase in women. There was a significant inverse relationship between VO 2 max and AIx@75, with VO 2 max being a significant predictor of AIx@75 in men (P = 0.01). For every unit increase in VO 2 max, there was a 0.60 unit decrease in AIx@75 in men versus a 0.2 unit decrease in women. Conclusions: The associations beHow to cite this paper: Latchman, P.L., Thiel, R., Gates, G., Zhu, W.L., Axtell, R., Gardner, K., Lunn, W. and DeMeersman, R.

No abstract