scholarly journals Comparison of Baroreflex Sensitivity and Cardiac Autonomic Function Between Adolescent Athlete and Non-athlete Boys – A Cross-Sectional Study

2019 ◽  
Vol 10 ◽  
Author(s):  
Senthil Kumar Subramanian ◽  
Vivek Kumar Sharma ◽  
Vinayathan Arunachalam ◽  
Rajathi Rajendran ◽  
Archana Gaur
Keyword(s):  
Baroreflex Sensitivity ◽  
Autonomic Function ◽  
Cross Sectional Study ◽  
Cardiac Autonomic Function ◽  
Sectional Study ◽  
Cross Sectional ◽  
Adolescent Athlete

scholarly journals Heart rate variability and long chain n-3 PUFA in patients with chronic kidney disease commencing haemodialysis: a cross-sectional study

2020 ◽  
Vol 79 (OCE2) ◽  
Author(s):  
Ana Pinto ◽  
Helen MacLaughlin ◽  
Robert Gray ◽  
Wendy Hall
Keyword(s):  
Chronic Kidney Disease ◽  
Fatty Acids ◽  
Heart Rate ◽  
Cardiac Death ◽  
Autonomic Function ◽  
Cross Sectional Study ◽  
Cardiac Autonomic Function ◽  
Sectional Study ◽  
Cross Sectional ◽  
Long Chain

AbstractThe risk of sudden cardiac death (SCD) is doubled when a patient with chronic kidney disease (CKD) stage 5 starts haemodialysis. Low heart rate variability (HRV) has been reported to be independently associated with increased risk of SCD and all cardiac death in haemodialysis patients. Long chain n-3 polyunsaturated fatty acids (LC n-3 PUFA; 20:5n-3, EPA and 22:6n-3, DHA) may exert anti-arrhythmic effects on cardiac myocytes. Haemodialysis patients have lower serum LC n-3 PUFA levels compared to populations without CKD. Few studies have investigated the relationship between LC n-3 PUFA and HRV in patients with CKD. This study aimed to characterise the variability of LC n-3 PUFA status in patients who recently commenced haemodialysis, and to investigate relationships between LC n-3 PUFA status and HRV. A cross-sectional study was conducted in adults aged 40–80 years with CKD commencing haemodialysis (within 6–10 weeks) (NRES research ethics committee ref: 14/LO/0186). At 2 separate study days, pre-dialysis blood samples were taken to measure fatty acid composition by GC, and HRV monitors (Actiheart, CamNtech Ltd, UK) were fitted after dialysis had started to monitor parameters of cardiac autonomic function during dialysis, during the night, and for a total of 24 h. Forty-five patients (mean age 58 y, SD 9, 20 females/25 males) completed data collection at least once; 91% presented hypertension and 39% had type 2 diabetes. Sample mean omega-3 index (O3I; EPA + DHA as a % of fatty acids in erythrocyte membranes) was very low (3.45%, SD 1.25; median 3.26 %, IQR 1.32); only 2 individuals had O3I > 5%. Variability in erythrocyte EPA (median 0.66 %, IQR 0.42) and DHA (median 2.40 %, IQR 1.32) was limited. Most HRV parameters did not significantly correlate with O3I following adjustment (e.g. age, BMI, β-blockers). Plasma EPA significantly positively correlated with overall and longer phase components of HRV and significantly negatively correlated with beat-to-beat variability over 24 h after full adjustment for confounders. This suggests that although higher circulating EPA concentrations were associated with better cardiac responsivity to environmental stimulations over 24 h, they were also associated with poorer parasympathetic tone (the predominant influence on beat-to-beat HRV). No correlations were observed between plasma DHA and HRV. The divergent pattern of relationships between plasma EPA versus DHA and HRV raises the theory that patients commencing haemodialysis may have compromised conversion of EPA to DHA which may impair vagally-mediated regulation of cardiac autonomic function, a potential mechanism for high risk of SCD.

scholarly journals Association between Cardiac Autonomic Function, Oxidative Stress and Inflammatory Response in Impaired Fasting Glucose Subjects: Cross-Sectional Study

PLoS ONE ◽  
2012 ◽  
Vol 7 (7) ◽  
pp. e41889 ◽  
Author(s):  
Ramkumar Thiyagarajan ◽  
Senthil Kumar Subramanian ◽  
Nishanth Sampath ◽  
Madanmohan Trakroo ◽  
Pravati Pal ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Inflammatory Response ◽  
Impaired Fasting Glucose ◽  
Autonomic Function ◽  
Fasting Glucose ◽  
Cross Sectional Study ◽  
Cardiac Autonomic Function ◽  
Sectional Study ◽  
Cross Sectional

scholarly journals VEGF-A and cardiac autonomic function in newly diagnosed type 2 diabetes mellitus: A cross-sectional study at a tertiary care center

2019 ◽  
Vol 8 (10) ◽  
pp. 3185 ◽  
Author(s):  
RajeshKumar Sharma ◽  
Suresh Ravichandran ◽  
Shival Srivastav ◽  
PrathameshHaridas Kamble ◽  
Shailja Chambial ◽  
...  
Keyword(s):  
Autonomic Function ◽  
Care Center ◽  
Tertiary Care ◽  
Cross Sectional Study ◽  
Tertiary Care Center ◽  
Newly Diagnosed ◽  
Cardiac Autonomic Function ◽  
Sectional Study ◽  
Cross Sectional

Cardiac Autonomic Function in the First Hours of Postnatal Life: An Observational Cross-Sectional Study in Term Neonates

2019 ◽  
Vol 40 (8) ◽  
pp. 1703-1708 ◽  
Author(s):  
Leva A. Shayani ◽  
Carlos J. da Cruz ◽  
Luiz Guilherme G. Porto ◽  
Guilherme E. Molina
Keyword(s):  
Autonomic Function ◽  
Cross Sectional Study ◽  
Postnatal Life ◽  
Cardiac Autonomic Function ◽  
Sectional Study ◽  
Cross Sectional ◽  
Term Neonates

scholarly journals An Exploratory Study of Autonomic Function Investigations in Hemophiliacs on Homoeopathy Medications Using Impedance Plethysmography

2017 ◽  
Vol 22 (4) ◽  
pp. 760-764
Author(s):  
Tapas K. Kundu ◽  
Pradip B. Barde ◽  
Ghanshyam D. Jindal ◽  
Farooq F. Motiwala
Keyword(s):  
Autonomic Function ◽  
Matched Control ◽  
Low Frequency ◽  
Impedance Plethysmography ◽  
Frequency Domain Analysis ◽  
Cross Sectional Study ◽  
Autonomic Activity ◽  
Sectional Study ◽  
Cross Sectional ◽  
Medical College

Background. Status of autonomic homoeostasis in hemostasic disturbances due to hemophilia needs to be studied. Objectives. To compare autonomic nervous system markers measured by heart rate variability (HRV) and blood flow variability (BFV) in hemophiliacs and healthy age-matched control population using medical analyzer system. Design. Cross-sectional study. Settings. Motiwala Homoeopathy Medical College, and Hemophilia Clinics, Nashik. Subjects. Eighty subjects. Interventions. Nil. Outcome Measures. Autonomic function markers for HRV and BFV. Results. Among 80 subjects, BFV time domain measure, root mean square of successive NN (normal-to-normal) interval differences (RMSSD), was significantly higher among hemophiliacs than nonhemophiliacs. Frequency domain analysis parameter, low frequency for both HRV and BFV was significantly higher among hemophiliacs as compared with nonhemophiliacs. Conclusions. Hemophiliacs were shown to have higher autonomic activity as compared with healthy controls. Homoeopathic medicines used as an adjunct was associated with decrease in parasympathetic modulations.

scholarly journals Effects of Greater Central Arterial Stiffness on Cardiovagal Baroreflex Sensitivity in Resistance-Trained Men

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Nobuhiro Nakamura ◽  
Isao Muraoka
Keyword(s):  
Arterial Stiffness ◽  
Baroreflex Sensitivity ◽  
Arterial Compliance ◽  
Cross Sectional Study ◽  
Stiffness Index ◽  
Control Group ◽  
Sectional Study ◽  
Trained Group ◽  
Cross Sectional ◽  
Phase Iv

Abstract Background Compared with age-matched untrained men, resistance-trained men who have undergone long duration training (> 2 years) at a high frequency (> 5 days/week) may be lower cardiovagal baroreflex sensitivity (BRS) because of central arterial stiffening. Therefore, the purpose of this study was to examine the effect of greater central arterial stiffness in resistance-trained men on cardiovagal BRS in a cross-sectional study to compare resistance-trained men with age-matched untrained men. Methods This cross-sectional study included resistance-trained men (n = 20; age: 22 ± 3; body mass index: 26.7 ± 2.2) and age-matched untrained men (control group: n = 20; age: 25 ± 2; body mass index: 23.7 ± 2.4). The β-stiffness index and arterial compliance were assessed at the right carotid artery using a combination of a brightness mode ultrasonography system for the carotid artery diameter and applanation tonometry for the carotid blood pressure. And, the cardiovagal BRS was estimated by the slope of the R–R interval and systolic blood pressure during Phase II and IV of Valsalva maneuver (VM). The participants maintained an expiratory mouth pressure of 40 mmHg for 15 s in the supine position. Results The β-Stiffness index was significantly higher in the resistance-trained group than in the control group (5.9 ± 1.4 vs. 4.4 ± 1.0 a.u., P < 0.01). In contrast, the resistance-trained group had significantly lower arterial compliance (0.15 ± 0.05 vs. 0.20 ± 0.04 mm2/mmHg, P < 0.01) and cardiovagal BRS during Phase IV of VM (9.0 ± 2.5 vs. 12.9 ± 5.4 ms/mmHg, P < 0.01) than the control group and. Moreover, cardiovagal BRS during Phase IV of VM was inversely and positively correlated with the β-stiffness index (r = − 0.59, P < 0.01) and arterial compliance (r = 0.64, P < 0.01), respectively. Conclusion Resistance-trained group had greater central arterial stiffness and lower cardiovagal BRS Phase IV compared with control group. Moreover, the central arterial stiffening was related to cardiovagal BRS Phase IV. These results suggest that greater central arterial stiffness in resistance-trained men may be associated with lower cardiovagal BRS. Trial Registration University hospital Medical Information Network (UMIN) in Japan, UMIN000038116. Registered on September 27, 2019.

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