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Table 3 Comparison of DC, AC and HRV parameters between patients in the VT and non-VT groups

From: Cardiac autonomic function in patients with acute exacerbation of chronic obstructive pulmonary disease with and without ventricular tachycardia

Variable Non-VT group (n = 48) VT group (n = 22) P
DC (ms) 5.62 ± 1.75 4.13 ± 1.72 0.036
AC (ms) -5.82 ± 1.84 -4.76 ± 1.69 0.040
SDNN (ms) 78.7 ± 22.1 68.2 ± 19.8 0.041
SDANN (ms) 68.7 ± 11.0 58.5 ± 10.5 0.043
rMSSD (ms) 21.3 ± 8.2 14.6 ± 6.2 0.045
LF (ms2) 1152.2 ± 440.5 1250.2 ± 408.6 0.068
HF (ms2) 221.5 ± 34.1 210.8 ± 27.6 0.071
LF/HF ratio 5.1 ± 2.0 5.9 ± 2.5 0.070
  1. Data presented as the mean ± standard deviation
  2. AC acceleration capacity of the heart rate, DC deceleration capacity of the heart rate, HF high-frequency power, LF low-frequency power, rMSSD the root mean square value of the standard deviations of the successive differences between adjacent normal RR intervals in the whole 24-h period, SDANN the standard deviation of the average normal RR intervals in all 5-min segments, SDNN the standard deviation of all normal RR intervals, VT ventricular tachycardia