Effect of the β-blockers on the autonomic activities, fractal properties and MSE.

While the conventional HRV measurements showed no significant different between these two groups, nonlinear indices, DFAα1 and the value of Slope5, were significantly lower in patients without β-blocker therapy.Slope5 = the linear-fitted slope of the first 5 scales, Area5 = the summations of quantitative values of scale 1–5, Area6–20 = the summations of quantitative values of scale 6–20.