A 12-month lifestyle intervention does not improve cardiac autonomic function in patients with chronic kidney disease

Huppertz, Nina, Beetham, Kassia S., Howden, Erin J., Leicht, Anthony S., Isbel, Nicole M., and Coombes, Jeff S. (2020) A 12-month lifestyle intervention does not improve cardiac autonomic function in patients with chronic kidney disease. Autonomic Neuroscience: Basic and Clinical, 224. 102642.

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Objectives: Patients with chronic kidney disease (CKD) are at a high risk of future autonomic dysfunction and cardiovascular disease. The aim of this study was to examine the effects of a 12-month lifestyle intervention (LI) involving regular aerobic exercise on cardiac autonomic function in CKD patients. Design: Pooled exploratory analysis.

Methods: 113 eligible patients with stage 3-4 CKD (eGFR 25-60 ml/min/1.75m(2)) participated in a LI program, including an 8-week individualised gym-based exercise program followed by a 10-month home-based program. The control (CON) group underwent standard nephrological care. The following parameters were assessed prior to and following the 12-month study period: cardiorespiratory fitness (VO(2)peak) from a graded exercise test; cardiac autonomic function from time, frequency, and non-linear measures of heart rate variability (HRV), heart rate (HR) recovery following peak exercise, and chronotropic competence during exercise.

Results: Compared to the CON group, the LI group significantly increased VO(2)peak (CON = -1.0 vs. LI = +1.8 ml/kg/min, p < 0.01) while there was no significant improvement in any HRV measure (p = 0.85), HR recovery (p = 0.38) or chronotropic competence (p = 0.28). Changes in relative VO(2)peak were significantly associated with changes in a non-linear HRV measure, alpha 1 (p < 0.01), independent of age and eGFR (r(2) = 0.196, p = 0.03).

Conclusions: Despite the significant increase in cardiorespiratory fitness for the LI group, there were no changes in cardiac autonomic function. However, alpha 1 may be a sensitive measure to assess VO(2)peak changes in this clinical cohort. Further research is required to investigate the role of different modalities of exercise training to enhance cardiac autonomic function in patients with CKD.

Item ID: 63077
Item Type: Article (Research - C1)
ISSN: 1872-7484
Keywords: Autonomic dysfunction, Heart rate variability, Heart rate recovery, Heart rate reserve, Exercise, Renal insufficiency
Copyright Information: © 2020 Elsevier B.V. All rights reserved.
Funders: National Health and Medical Research Council of Australia (NHMRC), University of Queensland, Princess Alexandra Hospital
Projects and Grants: NHRMC CRC Vascular and Metabolic Health
Date Deposited: 13 May 2020 07:31
FoR Codes: 32 BIOMEDICAL AND CLINICAL SCIENCES > 3202 Clinical sciences > 320214 Nephrology and urology @ 50%
32 BIOMEDICAL AND CLINICAL SCIENCES > 3208 Medical physiology > 320803 Systems physiology @ 50%
SEO Codes: 92 HEALTH > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920103 Cardiovascular System and Diseases @ 40%
92 HEALTH > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920119 Urogenital System and Disorders @ 60%
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