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Purpose: The aims of this study were to compare the autonomic heart control parameters from sarcopenic and non-sarcopenic community-dwelling elders., Methods: This is a cross-sectional study including 76 community-dwelling old adults, which was clinically stratified as sarcopenic or non-sarcopenic, according to the current recommendations. They were submitted to 5-min recordings of successive RR intervals. The analysis of the RR intervals variability was carried out in time (mean RR, RMSSD, pNN50, SDNN and triangular index) and frequency domains (LFnu, HFnu and LF/HF ratio), and with nonlinear methods (SD1, SD2, and D 2 ). The parameters of autonomic heart rate modulation (AHRM) were adjusted for potential confounders: sex, diabetes, beta-blockers use, cardiovascular disease, body mass index and physical activity level, smoking habit. Normality of the data was tested by Kolmogorov-Smirnov test and, since most variables did not exhibit a normal distribution the Mann-Whitney test was used to compare the parameters of AHRM. The significance level was set as p ≤ 0.05 and all statistical procedures were performed with SPSS ® ., Results: Adjusted parameters of AHRM obtained from time domain and nonlinear methods were significantly different between sarcopenic and non-sarcopenic elders (p < 0.05), while parameters obtained from frequency domain analysis did not were different between groups (p > 0.05)., Conclusion: Sarcopenic old adults exhibited lower parasympathetic-associated modulation, suggesting a poor cardioprotection associated to this condition., (Copyright © 2018 Elsevier B.V. All rights reserved.)

Objective: The present study aimed to analyze the influence of smoking on heart autonomic control in elderly adults who did and did not smoke., Methods: In a population-based study, all community-dwelling elderly adults (≥60 years old) from Aiquara, Bahia, Brazil, were invited to participate in the study. Two-hundred-thirty-two (232) elderly adults provided information about their smoking habits and underwent 5-min recordings of successive RR intervals. Analysis of the variability of the RR intervals was performed in time and frequency domains and with nonlinear methods. The HAC parameters were adjusted for the following potential confounders: age, sex, diabetes, beta-blocker use, cardiovascular disease, body mass index and physical activity level. After exclusions, 210 elderly adults were divided into 2 groups, nonsmokers or those who stopped smoking (NSMOK [n=190]) and current smokers (SMOK [n=20]). Owing to the absence of a normal distribution, the Mann-Whitney test was used for group comparisons., Results: For unadjusted HAC parameters, a significant difference was observed (p<0.05) between groups for the following parameters in the time domain: CV&#95;RR; SDNN; RMSSD; pNN50; triangular index TINN; and nonlinear parameters SD1, SD2 and D2. All of the adjusted HAC parameters (including the Mean RR and frequency domain parameters) were significantly different between the groups., Conclusion: Together, the HAC parameters indicated a higher variability of successive RR intervals in NSMOK elderly adults. Notwithstanding, adjustment of the HAC parameters was an important step to improve data analysis. These results indicate an impaired sympathovagal balance on the heart of elderly adult smokers., (Copyright © 2016 Hellenic Society of Cardiology. Published by Elsevier B.V. All rights reserved.)