Heart Rate Variability, Left Ventricular Functions, and Cardiac Autonomic Neuropathy in Patients Undergoing Chronic Hemodialysis

Figures & data

Table 1. Baseline values, heart rate variability, and echocardiographic parameters of subjects in Group I and Group II

Parameters	Group I	Group II	P value
Age, years	31.6±13.0	30.7±21.9	NS
Gender, male/female	10/10	12/10	NS
HD duration, months	—	21.11±8.2
SBP supine, mmHg	113.1±15.3	150.1±39.3	P<0.01
DBP supine, mmHg	72.1±9.7	100.3±17.2	P<0.01
ESV, mL	34.0±14.3	59.3±21.1	P<0.05
EDV, mL	96.9±18.9	131.5±37.3	P<0.01
EF, %	63.7±10.1	52.3±2.4	P<0.001
FS, %	34.0±7.0	29.0±1.0	P<0.05
F1, Hz	0.08±0.01	0.09±0.01	NS
P1, msec^2	911.0±685.5	136.2±173.9	P<0.001
F2, Hz	0.29±0.08	0.32±0.06	NS
P2 msec^2	499.7±679.5	96.5±149.6	P<0.01
P1/P2	1.82±1.00	1.41±1.12	NS

HD: Hemodialysis; FS: Fractional shortening; SBP: Systolic blood pressure; F₁: Central frequencies of LF peak; DBP: Diastolic blood pressure; F₂: Central frequencies of HF peak; ESV: End systolic volume; P₁: Power of low frequency band; EDV: End diastolic volume; P₂: Power of high frequency band; EF: Ejection fraction.

Figure 1. Time series of RR intervals and the power spectra in control subject (a), in patients undergoing hemodialysis for two months (b), and 64 months (c).