Cognitive and autonomic dysfunction measures in normal controls, white coat and borderline hypertension

Table 4 Comparison of heart rate variability measures between three groups; healthy normal subjects, white coat hypertension, and borderline hypertension subjects

HRV 24-hours	Normal BP (N = 20)	WCH (N = 19)	BLH (N = 30)	Post-hoc
	Mean ± SD	Mean ± SD	Mean ± SD	p value
24hr MHR	77 ± 8	71 ± 10	77 ± 8	> 0.05
24hr Triangular Index	43 ± 10	39 ± 16	37 ± 11	> 0.05
SDNN	154 ± 50	149 ± 46	130 ± 33	< 0.05
24hr SDNN Index	71 ± 28	64 ± 25	58 ± 15	> 0.05
SDANN	130 ± 47	130 ± 41	113 ± 32	> 0.05
RMSSD	45 ± 28	33 ± 22	31 ± 14	< 0.05
24IT ±SD	43 ± 10	39 ± 16	37 ± 11	> 0.05

HRV; Heart rate variability, BP; blood pressure, WCH; White coat hypertension, BLH; borderline hypertension, MHR; Mean heart rate, SDNN; Standard deviation normal to normal interval, SDANN; Standard deviation average normal to normal interval, RMSSD; Square root of the mean squared differences of successive R-R intervals, 24IT; inspection time.

ISSN: 1471-2261