Cardiac autonomic function during postural changes and exercise in people with multiple sclerosis: A cross-sectional study.

Abstract:

BACKGROUND:People with multiple sclerosis (PwMS) often develop an autonomic dysfunction (AD), which onset should be assessed early at a subclinical level, as it may interfere with pharmacological treatments and exercise. OBJECTIVE:To evaluate basal cardiac autonomic tone, its modulations during sit-to-stand, sub-maximal exercise and recovery in PwMS without clinical overt AD and its relationships with fatigue perception. METHODS:Twenty-three PwMS (55 ± 8 yrs [mean ± SD]; EDSS score 5.7 ± 1.3) and 20 age-matched healthy controls (HC; 55 ± 8yrs) were enrolled. ECG was digitally acquired during:1) sitting at rest (low sympathetic activation); 2) standing (light sympathetic activation); and 3) during light exercise (moderate sympathetic activation) and recovery. Parasympathetic and sympatho-vagal parameters of heart rate (HR) variability in time and frequency domains were calculated from beat series. RESULTS:HR was slightly but not significantly higher in PwMS compared to HC in all experimental conditions. Parasympathetic indexes were significantly lower (p < 0.05) in PwMS compared to HC during baseline sitting and post-exercise recovery, whereas sympathovagal parameters were similar in both groups. No correlation between autonomic tone and perceived fatigue was observed. CONCLUSION:Parasympathetic tone appears to be impaired in PwMS basal and post-exercise conditions, but not during postural challenge and exercise. In addition, AD does not affect perceived fatigue.

authors

Gervasoni E,Bove M,Sinatra M,Grosso C,Rovaris M,Cattaneo D,Merati G

doi

10.1016/j.msard.2018.06.003

subject

Has Abstract

pub_date

2018-08-01 00:00:00

pages

85-90

eissn

2211-0348

issn

2211-0356

pii

S2211-0348(18)30180-9

journal_volume

24

pub_type

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