scholarly journals 25-Hydroxyvitamin D and Its Relationship with Autonomic Dysfunction Using Time- and Frequency-Domain Parameters of Heart Rate Variability in Korean Populations: A Cross-Sectional Study

Nutrients ◽  
2014 ◽  
Vol 6 (10) ◽  
pp. 4373-4388 ◽  
Author(s):  
Young Tak ◽  
Jeong Lee ◽  
Yun Kim ◽  
Sang Lee ◽  
Byung Cho
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Frequency Domain ◽  
Autonomic Dysfunction ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D

scholarly journals Marine n-3 PUFA, heart rate variability and ventricular arrhythmias in patients on chronic dialysis: a cross-sectional study

2018 ◽  
Vol 120 (3) ◽  
pp. 317-325 ◽  
Author(s):  
Jesper M. Rantanen ◽  
Erik B. Schmidt ◽  
Sam Riahi ◽  
Søren Lundbye-Christensen ◽  
Jeppe H. Christensen
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Autonomic Dysfunction ◽  
Ventricular Arrhythmias ◽  
Plasma Phospholipid ◽  
Cross Sectional Study ◽  
Chronic Dialysis ◽  
Phospholipid Content ◽  
Sectional Study ◽  
Cross Sectional

AbstractMarine n-3 PUFA may improve autonomic dysfunction by an increase in heart rate variability (HRV) and may reduce the risk of malignant ventricular arrhythmias. Only a few smaller studies have examined such effects in patients on chronic dialysis, who often have autonomic dysfunction and a high risk of sudden cardiac death, which accounts for almost 30 % of all deaths. This cross-sectional study investigated the association between the plasma phospholipid content of n-3 PUFA and 24-h HRV or ventricular arrhythmias in patients on chronic dialysis. A 48-h Holter monitoring was performed on 169 patients on in-centre dialysis (83 %), home haemodialysis (10 %) or peritoneal dialysis (7 %) obtaining data on arrhythmias (n 152) and 24-h HRV (n 135). The mean overall HRV (standard deviation of normal intervals (SDNN)) was low and 71 % had a reduced overall HRV (SDNN<100 ms) indicating autonomic dysfunction. No significant associations between plasma phospholipid content of total marine n-3 PUFA, EPA (22 : 5n-3) or DHA (22 : 6n-3) and time-domain or frequency-domain HRV were detected in crude or adjusted linear regression analysis. However, a higher plasma phospholipid content of DHA was associated with a significantly lower proportion of patients with ventricular tachycardia (higher DHA-tertile: 9 % v. lower DHA-tertile: 28 %, P=0·02). In conclusion, the content of marine n-3 PUFA in plasma phospholipids was not associated with 24-h HRV, but a higher plasma phospholipid content of DHA was associated with a lower occurrence of ventricular tachycardia suggesting an antiarrhythmic effect of marine n-3 PUFA in patients on chronic dialysis.

scholarly journals Heart Rate Variability Analysis in Episodic Migraine: A Cross-Sectional Study

2021 ◽  
Vol 12 ◽  
Author(s):  
Lvming Zhang ◽  
Shi Qiu ◽  
Chunxia Zhao ◽  
Peifu Wang ◽  
Shengyuan Yu
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Frequency Domain ◽  
Time Domain ◽  
Domain Analysis ◽  
Episodic Migraine ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional ◽  
Autonomic Nervous

Objective: It has been reported that autonomic nervous dysfunction is more prevalent in migraineurs. Heart rate variability (HRV) is a commonly used method to evaluate the cardiac autonomic nervous function modulation. However, HRV changes in migraine are still contradictory. The main objective of this study was to explore the potential HRV change patterns in episodic migraine (EM) and whether there were differences in HRV between EM ictal period and the interictal period.Patients and Methods: We conducted a cross-sectional study including 18 patients with EM and 18 age- and sex-matched controls. The characteristics of demographics, some lifestyle factors, and psychological conditions were assessed at baseline. HRVs including time-domain analysis and frequency-domain analysis were performed in all participants. HRV analyses in migraine were recorded not only in the interictal period but also in the ictal period.Results: All the HRV parameters showed a decreased trend in migraine than controls. Time-domain parameters standard deviation of all NN intervals in 24 h (SDNN) and triangular index were significantly lower in the migraine ictal period than controls separately (SDNN, 56.94 ± 22.09 ± 7.76 vs. 135.78 ± 35.16, p &lt; 0.001; triangular index, 12.61 ± 3.20 vs. 22.11 ± 6.90, p &lt; 0.001). Frequency-domain parameter low-frequency power was also lower in the migraine ictal period than controls (351.28 ± 206.71 vs. 559.61 ± 281.24, p = 0.02). SDNN was much lower in the migraine ictal period than migraine interictal period (56.94 ± 22.09 vs. 115.94 ± 46.88, p &lt; 0.001). HRV changes during migraine interictal period did not differ from the control group. The correlation analysis revealed a negative correlation between visual analog scale and HRV parameters in the migraine ictal period (p = 0.04).Conclusions: The present cross-sectional study indicates that HRV was significantly decreased in EM population especially during the migraine ictal period, which means unbalance of autonomic system in EM. Perhaps larger prospective cohort studies are wanted to validate these findings.

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 Vitamin D Deficiency Is Common in Ghana despite Abundance of Sunlight: A Multicentre Comparative Cross-Sectional Study

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Samuel Asamoah Sakyi ◽  
Maxwell Hubert Antwi ◽  
Linda Ahenkorah Fondjo ◽  
Edwin Ferguson Laing ◽  
Richard K. Dadzie Ephraim ◽  
...  
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Geographical Area ◽  
Daily Intake ◽  
Cross Sectional Study ◽  
The Body ◽  
Sectional Study ◽  
Cross Sectional ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D

Background. Vitamin D is a steroid hormone important for the normal functioning of the body. It is produced through skin exposure to sunlight and from the diet. Although Ghana is located in the tropics where sunlight is abundant, factors like culture, diet, skin pigmentation, variation in the ozone layer, and geographical area influence the optimization of vitamin D concentration. It is imperative to evaluate the interplay between sunshine exposure, proinflammatory cytokines, and mediators of vitamin D metabolism and their relationship to vitamin D status in three geographical sections among apparent healthy Ghanaians. Methods and Results. In a cross-sectional study, a total of five hundred (500) healthy blood donors from three geographical areas in Ghana were enrolled. Their age ranged from 17 to 55 years with a mean age of 27.97 ± 8.87 years. The overall prevalence rate of vitamin D deficiency was 43.6% (218/500), with 41.2% (91/221), 45.3% (63/139), and 45.7% (64/140) of vitamin D deficiency being recorded in participants from the Northern Sector (NS), Middle Belt (MB), and Southern Sector (SS), respectively. However, there were no significant differences in the proportions of vitamin D deficiency across various geographical sectors. The median 25-hydroxyvitamin D serum levels were compared among geographical areas (NS, MB, and SS) and there were no significant differences ( P = 0.275 ) after adjusting for confounding factors. 25-Hydroxyvitamin D correlated positively with corrected ionized calcium (rs = 0.622, P ≤ 0.001 ) and phosphorus (rs = 0.299, P ≤ 0.001 ) and negatively correlated with SBP (rs = −0.092, P = 0.039 ), vitamin D binding protein (VDBP) (rs = −0.421, P ≤ 0.001 ), intact parathyroid hormone (iPTH) (rs = −0.0568, rs ≤ 0.001), IFN-gamma (rs = −0.684, P ≤ 0.001 ), and TNF-alpha (rs = −0.600, P ≤ 0.001 ). After adjusting for possible confounders, not having knowledge about vitamin D foods, taking fewer vitamin D foods, and higher levels of IF-γ and IL-10 were associated with a higher risk of having vitamin D deficiency. Conclusion. The prevalence of 25-hydroxyvitamin D deficiency is high among the general adult population in Ghana despite the abundance of sunlight. Increasing knowledge on vitamin D diet coupled with a daily intake of vitamin D dietary supplements is likely to reduce the risk of developing 25-hydroxyvitamin D deficiency.

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

Deficiency of 25-hydroxyvitamin D in male HIV-positive patients: A descriptive cross-sectional study

2010 ◽  
Vol 42 (4) ◽  
pp. 306-310 ◽  
Author(s):  
Ulrich Christian Bang ◽  
Shakil A. Shakar ◽  
Mette Friberg Hitz ◽  
Mette Syberg Jespersen ◽  
Ove Andersen ◽  
...  
Keyword(s):  
Cross Sectional Study ◽  
Hiv Positive ◽  
Sectional Study ◽  
Cross Sectional ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D
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