scholarly journals Age-Predicted Maximal Heart Rate in Recreational Marathon Runners: A Cross-Sectional Study on Fox's and Tanaka's Equations

2018 ◽  
Vol 9 ◽  
Author(s):  
Pantelis T. Nikolaidis ◽  
Thomas Rosemann ◽  
Beat Knechtle
Keyword(s):  
Heart Rate ◽  
Cross Sectional Study ◽  
Maximal Heart Rate ◽  
Sectional Study ◽  
Cross Sectional ◽  
Marathon Runners

scholarly journals Heart rate variability and blood pressure among Japanese men and women: a community-based cross-sectional study

2014 ◽  
Vol 37 (8) ◽  
pp. 779-784 ◽  
Author(s):  
Hiromi Mori ◽  
Isao Saito ◽  
Eri Eguchi ◽  
Koutatsu Maruyama ◽  
Tadahiro Kato ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Community Based ◽  
Cross Sectional ◽  
Japanese Men ◽  
Men And Women

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.

Analysis of the heart rate deflection point as a tool for exercise prescription in subjects with COPD - a cross-sectional study

2019 ◽  
Vol 36 (12) ◽  
pp. 1322-1328
Author(s):  
Marceli Rocha Leite ◽  
Ercy Mara Cipulo Ramos ◽  
Carlos Augusto Kalva-Filho ◽  
Bruna Spolador De Alencar Silva ◽  
Ana Paula Coelho Figueira Freire ◽  
...  
Keyword(s):  
Heart Rate ◽  
Exercise Prescription ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional

scholarly journals Urinary Metals and Heart Rate Variability: A Cross-Sectional Study of Urban Adults in Wuhan, China

2015 ◽  
Vol 123 (3) ◽  
pp. 217-222 ◽  
Author(s):  
Wei Feng ◽  
Xiaosheng He ◽  
Mu Chen ◽  
Siyun Deng ◽  
Gaokun Qiu ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional ◽  
Urban Adults

Sports practice is related to resting heart rate in adolescents regardless of confounding factors: Cross-sectional study

2018 ◽  
Vol 33 (5) ◽  
pp. 319-322 ◽  
Author(s):  
D.G.D. Christofaro ◽  
S.M. Andrade ◽  
L.C.M. Vanderlei ◽  
R.A. Fernandes ◽  
J. Mota
Keyword(s):  
Heart Rate ◽  
Cross Sectional Study ◽  
Confounding Factors ◽  
Resting Heart Rate ◽  
Sectional Study ◽  
Cross Sectional
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