Philbois SV, Gastaldi AC, Facioli TDP, Felix ACS, Reis RMD, Fares TH, Souza HCDD. Women with Polycystic Ovarian Syndrome Exhibit Reduced Baroreflex Sensitivity That May Be Associated with Increased Body Fat.
Arq Bras Cardiol 2019;
112:424-429. [PMID:
30843930 PMCID:
PMC6459434 DOI:
10.5935/abc.20190031]
[Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 08/15/2018] [Indexed: 11/20/2022] Open
Abstract
Background
Polycystic ovarian syndrome (PCOS) women have a high prevalence of obesity
and alterations in cardiovascular autonomic control, mainly modifications in
heart rate variability (HRV) autonomic modulation. However, there are few
studies about other autonomic control parameters, such as blood pressure
variability (BPV) and baroreflex sensitivity (BRS). In addition, there are
still doubts about the obesity real contribution in altering autonomic
control in these women.
Objective
To investigate BPV and BRS autonomic modulation alterations in PCOS women, as
well as, to evaluate whether these alterations are due PCOS or increased
body fat.
Methods
We studied 30 eutrophic volunteers [body mass index (BMI) < 25
kg/m2] without PCOS (control group) and 60 volunteers with
PCOS divided into: eutrophic (BMI < 25 kg/m2, N = 30) and
obese women (BMI > 30 kg/m2, N = 30). All volunteers were
submitted to anthropometric evaluation, hemodynamic and cardiorespiratory
parameters record at rest and during physical exercise, analysis of HRV, BPV
and spontaneous BRS. The differences in p less than 5% (p < 0.05) were
considered statistically significant.
Results
Related to eutrophics groups, there were no differences in autonomic
parameters evaluated. The comparison between the PCOS groups showed that
both PCOS groups did not differ in the BPV analysis. Although, the obese
PCOS group presented lower values of spontaneous BRS and HRV, in low
frequency and high frequency oscillations in absolute units.
Conclusion
Our results suggest that obesity did little to alter HRV in women with PCOS,
but it may influence the spontaneous BRS.
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