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Title of Journal: Clin Auton Res

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Abbravation: Clinical Autonomic Research

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Springer Berlin Heidelberg

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DOI

10.1002/pssa.2210680238

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ISSN

1619-1560

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Cardiovascular autonomic control in paraplegic and

Authors: Elizângela Márcia de Carvalho Abreu Lucas Pinto Salles Dias Fernanda Pupio Silva Lima Alderico Rodrigues de Paula Júnior Mário Oliveira Lima
Publish Date: 2016/03/07
Volume: 26, Issue: 2, Pages: 117-126
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Abstract

Spinal cord injury SCI is commonly associated with devastating paralysis This condition also results in cardiovascular autonomic dysfunction associated with increased mortality from cardiovascular disease The purpose of this study was to explore the differences in cardiovascular autonomic modulation in individuals with and without SCIThe study included 60 individuals 30 individuals without SCI who formed the control group—CG and 30 individuals with SCI who formed the SCI group—SCIG The latter group was divided into two one group of subjects with SCI above the spinal segment T6—SCIG above T6 and a group of individuals with SCI below T6—SCIG below T6 The subjects were evaluated by linear and nonlinear analysis of heart rate variability HRVThe SCIG showed significantly lower square root of the mean squares differences of successive NN intervals rMSSD number of pairs of adjacent NN intervals differing by more than 50 ms pNN50 standard deviation of shortterm HRV SD1 and high frequency power HF Their low frequency power LF in absolute units ms2 was significantly lower and their normalized units nu were significantly higher Their LF/HF ratio was significantly higher and sample entropy SampEn which indicates the complexity and irregularity of the NN intervals time series was significantly lower compared to the CG The differences between the SCIG and CG were derived mainly from the SCIG above T6 The correlation test revealed very low values between each of the parameters evaluated for CG and SCIGThe SCIG above T6 showed greater cardiovascular autonomic impairment compared to SCIG below T6 and CG The SCIG below T6 also presented some degree of autonomic dysfunction All parameters linear or nonlinear are suitable to demonstrate the differences between the SCIG and CG

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