Value of Assessing Autonomic Nervous Function by Heart Rate Variability and Heart Rate Turbulence in Hypertensive Patients

Table 5

Spearman correlation analysis of HRV and HRT in HP patients.

	TO		TS
	r value	P value	r value	P value
SDNN	-0.008	0.930	0.298	0.001
SDANN	0.023	0.800	0.260	0.004
rMSSD	0.006	0.945	0.292	0.001
pNN50	-0.012	0.895	0.228	0.012
VLF	-0.143	0.120	0.438	<0.0001
LF	-0.237	0.009	0.441	<0.0001
HF	-0.027	0.767	0.343	<0.0001
LF/HF	-0.241	0.008	0.095	0.301

HRV, heart rate variability; HRT, heart rate turbulence; HP, hypertensive; SDNN, standard deviation of NN intervals; SDANN, standard deviation of all 5-minute average NN intervals; rMSSD, square root of mean of the sum of squares of successive NN interval differences; pNN50, number of successive NN intervals differing by >50ms divided by the total number of successive NN intervals; VLF, very low frequency; LF, low frequency; HF, high frequency; TO, turbulence onset; TS, turbulence slope.