Cardiac autonomic regulation is impaired in girls with major depression

Heart Rate Variability: An Index of the Brain-Heart Interaction

“…We found significantly higher heart rate in adolescent girls suffering from major depression compared to controls (Tonhajzerova et al, 2009b(Tonhajzerova et al, , 2010. In contrast, other authors found no significant differences in heart rate between depressive adolescents and controls (Henje Blom et al, 2010).…”

“…2). Interestingly, we found lower complexity of the cardiac time series in a supine position and standing position in the same major depression group (Tonhajzerova et al, 2010). Reduced complexity in heart rate time series is believed to result from a lessened ability of regulatory subsystems to interact (Porta et al, 2007) resulting in maladaptation of physiological system.…”

“…Reduced complexity in heart rate time series is believed to result from a lessened ability of regulatory subsystems to interact (Porta et al, 2007) resulting in maladaptation of physiological system. These findings indicate impaired complex neurocardiac heart rate control in the adolescent girls with major depression before treatment (Tonhajzerova et al, 2010).…”

“…In our study (Tonhajzerova et al, 2010), we used novel nonlinear method -symbolic dynamics. Symbolic dynamics is a suitable method for the quantification of cardiac time series complexity indepedent of its magnitude and a potentially promising tool for shortterm heart rate variability assessment (Guzzetti et al, 2005;Voss et al, 2009).…”

A Physiological Approach to Prolonged Recovery From Sport-Related Concussion

“…Finally, the reactive depression experienced by some athletes after concussion may influence vagal tone and autonomic regulation. Cardiac autonomic regulation is impaired in girls with major depression 53 as well as in those with reactive depression (eg, bereavement). 54 Therefore, exercise treatment (discussed later) may be beneficial from a psychosocial perspective to improve the negative mood driving the autonomic dysregulation in some patients after concussion.…”