Short-term effect of ligature-induced periodontitis on cardiovascular variability and inflammatory response in spontaneously hypertensive rats

Table 1 Systolic arterial pressure and pulse interval indices of variability in time and frequency domains

	WKY Sham	WKY PD	SHR Sham	SHR PD
Systolic arterial pressure
SD (mmHg)	4.8 ± 0.3	5.2 ± 0.2	8.8 ± 0.3*	6.6 ± 0.7*
LF (mmHg²)	2.7 ± 0.8	2.7 ± 0.4	15.8 ± 0.7*	12.3 ± 1.5*
Pulse interval
SDNN	7.9 ± 0.9	8.5 ± 0.6	7.9 ± 0.7	7.0 ± 1.0
RMSSD	5.8 ± 0.6	6.6 ± 0.4	4.9 ± 0.2*	4.9 ± 0.8*
LF (nu)	14.3 ± 1.4	16.5 ± 2.3	22.4 ± 2.0*	20.8 ± 1.7*
HF (ms²)	7.3 ± 1.5	8.8 ± 0.9	6.3 ± 0.6	7.3 ± 2.3

Values (means ± SEM) of variability indices of systolic arterial pressure and pulse interval (PI) variability in time and frequency domain. SD: standard deviation of AP values; SDNN: SD of normal-to-normal values of PI; RMSSD: square root of the mean of the sum of the square of differences between successive values of pulse interval; LF and HF: power of AP or PI spectra at low- (0.2 to 0.8 Hz) and high-frequency (0.8 to 3 Hz), respectively; nu: normalized units. *P < 0.05 compared to sham operated WKY. ^#P < 0.05 compared to sham operated SHR. Wistar Kyoto rats without periodontal disease (WKY + Sham, n = 7); Wistar Kyoto rats with periodontal disease (WKY + PD, n = 10); Spontaneously hypertensive rats without periodontitis (SHR + Sham, n = 7); Spontaneously hypertensive rats with periodontitis (SHR + PD, n = 6)

ISSN: 1472-6831