Aims: During insulin resistance, sympathetic nerve activity is increased. However insulin resistance is a common feature of obesity and essential hypertension, it is unclear if chronic hyperinsulinemia per se contributes to sympathetic overactivation. The purpose of our study was to explore++ the relationships between chronic hyperinsulinemia and heart rate variability (HRV), a non-intensive tool to assess autonomic function, in obese and hypertensive subjects.
Methods: 24 hours Holter ECG for HRV time and frequency domain analysis was performed in 77 patients, mean age 53 +/- 10 years, 52 men and 25 women, free of diabetes, without beta-blockers, divided in four groups according to three parameters, body mass index (BMI > 27 kg/m2 in man and > 25 kg/m2 in woman defined obesity), arterial pressure and insulinemia (fasting insulinemia > 25 mUI/L defined hyperinsulinemia): 27 patients obese, hypertensive, with hyperinsulinemia; 28 patients obese, hypertensive, without hyperinsulinemia; 12 patients non obese, hypertensive, without hyperinsulinemia; 10 patients obese, normotensive, without hyperinsulinemia.
Results: In comparison with the three other groups, patients with hyperinsulinemia showed a significant decrease (p < 0.05) of SDNN and the power of total spectrum (0.01-1 Hz) band, which are indexes of global HRV, and a significant decrease (p < 0.005) of SD and the normalized power of the low frequency (0.04-0.15 Hz) band, both indexes reflecting sympathetic modulation of HRV. In contrast, no significant difference was observed between the four groups for indexes of HRV reflecting parasympathetic tone. These relations were independent of mean RR. Fasting insulinemia was significantly (p < 0.0001) related with HRV in time domain (SDNN; r = -0.43; SD: r = -0.49) and spectral domain (total spectrum: r = -0.49; low frequency: r = -0.52).
Conclusion: Chronic hyperinsulinemia appears to be an important determinant of HRV, particularly for the indexes reflecting sympathetic influence, independent of obesity and hypertension.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Interactions between DASH-style diet and ADIPOQ and ARL15 genes polymorphisms on blood pressure and central obesity in Iranian adults.
Sci Rep
January 2025
Nutrition and Food Security Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
This study aimed to investigate the interactions between the Dietary approaches to stop hypertension (DASH) and the rs1501299 and rs6450176 SNPs in terms of cardiometabolic risk factors. This cross-sectional study was conducted on 387 adults (20-70 years old) residing in Yazd, Iran. The participants were selected from participants in the recruitment phase of the Yazd Health Study (YaHS) which is a population-based cohort of 9,962 adults.
View Article and Find Full Text PDFImproved erectile function after bariatric surgery: role of testosterone and other factors-a cohort prospective study.
Surg Obes Relat Dis
December 2024
2nd Department of General Surgery, Jagiellonian University Medical College, Cracow, Poland.
Background: The prevalence of obesity has risen dramatically worldwide. Beyond its metabolic implications, obesity profoundly impacts sexual health, particularly in males, with erectile dysfunction (ED) emerging as a prevalent and distressing co-morbidity. Studies show that bariatric surgery alleviates ED.
View Article and Find Full Text PDFAnastomotic Leak after Esophagectomy - Analysis of the STS General Thoracic Surgery Database.
Ann Thorac Surg
January 2025
Division of Cardiothoracic Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI.
Background: Anastomotic leak after esophagectomy is a major cause of morbidity and mortality. We sought to identify the prevalence of anastomotic leak, stratified by operative approach and disease etiology, as well as risk factors for leak.
Methods: A retrospective cohort analysis using the STS General Thoracic Surgery Database was conducted on patients who underwent esophagectomy with gastric reconstruction between 2009-2021.
Introduction: Metabolic syndrome has become a major health risk affecting patients worldwide and has been shown to be a risk factor for postoperative complications following abdominal surgery. This study aims to elucidate the link between metabolic syndrome and postoperative complications and mortality following esophagectomy.
Methods: This is a retrospective study analyzing the American College of Surgeons National Surgical Quality Improvement Program database (2017-2021).
Semaglutide and laparoscopic sleeve gastrectomy in an adolescent with congenital adrenal hyperplasia due to 21-hydroxylase: a case report.
J Med Case Rep
January 2025
Department of Surgery, Center for Endocrinology, Diabetes and Metabolism, Children's Hospital Los Angeles and Keck School of Medicine of USC, Los Angeles, CA, USA.
Background: Classic congenital adrenal hyperplasia, primarily due to 21-hydroxylase deficiency, leads to impaired cortisol and aldosterone production and excess adrenal androgens. Lifelong glucocorticoid therapy is required, often necessitating supraphysiological doses in youth to manage androgen excess and growth acceleration. These patients experience higher obesity rates, hypertension, and glucose metabolism issues, complicating long-term health management.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!