Retrospective Cohort Study
Copyright ©The Author(s) 2017.
World J Cardiol. Jan 26, 2017; 9(1): 27-38
Published online Jan 26, 2017. doi: 10.4330/wjc.v9.i1.27
Figure 2
Figure 2 Kaplan-Meier survival curves for patients with lowest quartile of standard deviation of all normal-to-normal intervals vs patients in the other standard deviation of all normal-to-normal intervals quartiles: Major clinical events-free survival curves (A), all-cause mortality curves (B). HRV: Heart rate variability; SDNN: Standard deviation of all normal-to-normal intervals; MCE: Major clinical events.