1
|
Quan W, Yu S, Huang Q, Ying M. The effect of forest-based health and wellness on the stress-relieve of middle-aged people. Front Public Health 2024; 12:1366339. [PMID: 38774044 PMCID: PMC11107287 DOI: 10.3389/fpubh.2024.1366339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Accepted: 04/18/2024] [Indexed: 05/24/2024] Open
Abstract
In order to explore the impact of experience in forest-based health and wellness (FHW) on the stress of middle-aged people, 12 participants aged 35-39 were selected to conduct a 3-day/2-night study on FHW experience in Wencheng, Wenzhou. Huawei bracelets were used to monitor participants' movement, pulse and blood pressure and their mood state was measured before and after the health care experience using the Profile of Mood States (POMS) scale. After the FHW experience, the lowest value of bracelet stress appeared on the second day of the experience for men and women. The total mood disturbance (TMD) decreased by 38.8 points on average, which significantly improved the positive mood and relieved the stress. The decompression effect of the FHW experience showed some variability among individuals. Furthermore, there were gender differences in alleviation of fatigue and puzzlement, which was greater for females than males.
Collapse
Affiliation(s)
- Wei Quan
- Zhejiang College of Security Technology, Wenzhou Key Laboratory of Natural Disaster Remote Sensing Monitoring and Early Warning, Wenzhou, China
| | - Shaona Yu
- Wenzhou Vocational College of Science and Technology, Wenzhou Key Laboratory of Adding Carbon Sinks and Reducing Carbon Emissions of Agriculture, Forestry and Fishery Ecosystem, Wenzhou, China
| | - Qi Huang
- Wenzhou Vocational College of Science and Technology, Wenzhou Key Laboratory of Adding Carbon Sinks and Reducing Carbon Emissions of Agriculture, Forestry and Fishery Ecosystem, Wenzhou, China
| | - Miaomiao Ying
- Wenzhou Vocational College of Science and Technology, Wenzhou Key Laboratory of Adding Carbon Sinks and Reducing Carbon Emissions of Agriculture, Forestry and Fishery Ecosystem, Wenzhou, China
| |
Collapse
|
2
|
Duan G, Song C, Liu Y, Fu Z, Zhang C, Han X, Li Y, Zhou Y. Study on the dynamic effects of plateau hypoxic and cold environment on the thermal adaptation of short-term sojourners in Xizang. J Therm Biol 2024; 119:103774. [PMID: 38128423 DOI: 10.1016/j.jtherbio.2023.103774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 11/13/2023] [Accepted: 11/30/2023] [Indexed: 12/23/2023]
Abstract
The plateau hypoxic environment can affect the thermoregulation process of the human body, and due to the different acclimatization ability to the hypoxic environment, the thermal requirements among the people who enter Xizang at different times may be different. Accordingly, this study aims to clarify how plateau hypoxic environments influence the physiological and subjective responses of people entering Xizang at different times. And field experiments were conducted in Xi'an and Lhasa, respectively, to compare the thermal responses and oxygen responses of the subjects under different temperature conditions on the plain, the first day of entering Xizang and the 15th day of entering Xizang. The results showed that under the hypoxic environment, the thermal sensation of the subjects decreased. With the extension of the time entering Xizang, the influence of the hypoxic environment on thermal comfort was gradually weakened, but under the low temperature environment, the effect of hypoxia on thermal response was not significantly reduced. The results of this study can help to reveal how plateau hypoxic environments affect human thermal comfort and provide a theoretical basis for the design of indoor thermal environment parameters suitable for sojourners entering Xizang at different times.
Collapse
Affiliation(s)
- Guannan Duan
- School of Building Services Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710055, China
| | - Cong Song
- State Key Laboratory of Green Building, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710055, China; School of Building Services Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710055, China.
| | - Yanfeng Liu
- State Key Laboratory of Green Building, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710055, China; School of Building Services Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710055, China
| | - Zhiguo Fu
- Xizang Autonomous Region Construction Survey and Design Institute, Lhasa, Xizang, 850000, China
| | - Cong Zhang
- Xizang Autonomous Region Construction Survey and Design Institute, Lhasa, Xizang, 850000, China
| | - Xu Han
- Institute of Military Environmental Teaching & Research, Army Engineering University of PLA, Nanjing, Jiangsu, 210007, China
| | - Yong Li
- Institute of Military Environmental Teaching & Research, Army Engineering University of PLA, Nanjing, Jiangsu, 210007, China
| | - Yong Zhou
- School of Management, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710055, China
| |
Collapse
|
3
|
Abstract
Sleep is a fundamental, evolutionarily conserved, plastic behavior that is regulated by circadian and homeostatic mechanisms as well as genetic factors and environmental factors, such as light, humidity, and temperature. Among environmental cues, temperature plays an important role in the regulation of sleep. This review presents an overview of thermoreception in animals and the neural circuits that link this process to sleep. Understanding the influence of temperature on sleep can provide insight into basic physiologic processes that are required for survival and guide strategies to manage sleep disorders.
Collapse
|
4
|
Coppi F, Pinti M, Selleri V, Zanini G, D'Alisera R, Latessa PM, Tripi F, Savino G, Cossarizza A, Nasi M, Mattioli AV. Cardiovascular Effects of Whole-Body Cryotherapy in Non-professional Athletes. Front Cardiovasc Med 2022; 9:905790. [PMID: 35757346 PMCID: PMC9227663 DOI: 10.3389/fcvm.2022.905790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 04/28/2022] [Indexed: 12/02/2022] Open
Abstract
Objectives: The study aimed to investigate changes in heart rate, blood pressure, respiratory rate, oxygen saturation, and body temperature in non-professional trained runners during whole body cryotherapy (WBC). Methods Ten middle-distance runners received 3 once-a-day sessions of WBC. Subjects underwent BP measurements and ECG recorded before and immediately after the daily WBC session. During WBC we recorded a single lead trace (D1) for heart rhythm control. In addition, the 5 vital signs Blood pressure, heart rate, respiratory rate, oxygen saturation, and body temperature were monitored before, during, and after all WBC session. Results We did not report significant changes in ECG main intervals (PR, QT, and QTc). Mean heart rate changed from 50.98 ± 4.43 bpm (before) to 56.83 ± 4.26 bpm after WBC session (p < 0.05). The mean systolic blood pressure did not change significantly during and after WBC [b baseline: 118 ± 5 mmHg, changed to 120 ± 3 mmHg during WBC, and to 121 ± 2 mmHg after session (p < 0.05 vs. baseline)]. Mean respiratory rate did not change during WBC as well as oxygen saturations (98 vs. 99%). Body temperature was slightly increased after WBC, however it remains within physiological values Conclusion In non-professional athletes WBC did not affect cardiovascular response and can be safely used. However, further studies are required to confirm these promising results of safety in elderly non-athlete subjects.
Collapse
Affiliation(s)
- Francesca Coppi
- Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Marcello Pinti
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Valentina Selleri
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
- National Institute for Cardiovascular Research—INRC, Bologna, Italy
| | - Giada Zanini
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Roberta D'Alisera
- Department of Public Healthcare, Sport Medicine Service Azienda USL of Modena, Modena, Italy
| | | | - Ferdinando Tripi
- “La Fratellanza 1874” Not-for-profit sport Association, Modena, Italy
| | - Gustavo Savino
- Department of Public Healthcare, Sport Medicine Service Azienda USL of Modena, Modena, Italy
| | - Andrea Cossarizza
- Department of Medical and Surgical Sciences for Children and Adults, University of Modena and Reggio Emilia, Modena, Italy
| | - Milena Nasi
- Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Anna Vittoria Mattioli
- Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, Modena, Italy
- National Institute for Cardiovascular Research—INRC, Bologna, Italy
- *Correspondence: Anna Vittoria Mattioli
| |
Collapse
|
5
|
Tochihara Y, Yamashita K, Fujii K, Kaji Y, Wakabayashi H, Kitahara H. Thermoregulatory and cardiovascular responses in the elderly towards a broad range of gradual air temperature changes. J Therm Biol 2021; 99:103007. [PMID: 34420637 DOI: 10.1016/j.jtherbio.2021.103007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 05/08/2021] [Accepted: 05/18/2021] [Indexed: 11/19/2022]
Abstract
This study aimed to determine age-related differences in thermoregulatory and cardiovascular responses to a wide range of gradual ambient temperature (Ta) changes. Morphologically matched normotensive elderly and young males participated. The participants wearing only shorts rested during the 3-h experiment. After 30 min of baseline at 28 °C, Ta increased linearly to 43 °C in 30 min (warming) and then gradually decreased to 13 °C in 60 min (cooling). Ta was rewarmed to 28 °C in 30 min (rewarming), and that temperature was maintained for an additional 30 min (second baseline). During the warming phase, there were no age-related differences in blood pressure (BP) and rectal temperature (Tre), despite a significantly lower cutaneous vascular conductance and heart rate in the elderly (P < 0.05). At the end of the cooling phase, systolic blood pressure (SBP) in the elderly was significantly higher than the young (155.8 ± 16.1 and 125.0 ± 12.5 mmHg, P < 0.01). There was a consistent age group difference in SBP during rewarming. Mean skin temperature was significantly lower in the elderly during rewarming (P < 0.05). Tre decreased more in the elderly and was significantly lower at the end of the experiment than the younger participants (36.78 ± 0.34 and 37.01 ± 0.15 °C, P < 0.05). However, there were no age group differences in thermal sensation. In conclusion, even normotensive elderly participants have a greater and more persistent BP response to cold than younger adults, suggesting that the elderly might be at a higher risk of cardiac events during cooling and subsequent rewarming.
Collapse
Affiliation(s)
- Yutaka Tochihara
- Environmental Ergonomics Laboratory, Department of Human Science, Faculty of Design, Kyushu University, Fukuoka, Japan
| | - Kazuaki Yamashita
- Environmental Ergonomics Laboratory, Department of Human Science, Faculty of Design, Kyushu University, Fukuoka, Japan; Toa, Kitakyushu, Japan
| | - Kenji Fujii
- Yamaguchi Prefectural Industrial Technology Institute, Ube, Japan
| | - Yumi Kaji
- Assisted Living Facility La Paz, Fukuoka, Japan
| | - Hitoshi Wakabayashi
- Environmental Ergonomics Laboratory, Department of Human Science, Faculty of Design, Kyushu University, Fukuoka, Japan; Laboratory of Environmental Ergonomics, Faculty of Engineering, Hokkaido University, Sapporo, Japan.
| | | |
Collapse
|
6
|
Li M, Zhao Y, Tian X, Liu P, Xie J, Dong N, Feng J, Gao Y, Fan Y, Qiu Y, Tian F, Yan X. Fluoride Exposure and Blood Pressure: a Systematic Review and Meta-Analysis. Biol Trace Elem Res 2021; 199:925-934. [PMID: 32602052 DOI: 10.1007/s12011-020-02232-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 05/31/2020] [Indexed: 12/07/2022]
Abstract
Fluoride exposure may cause changes in blood pressure, but this conclusion is controversial. Therefore, this meta-analysis aims to investigate the potential relationship between fluoride exposure and blood pressure or hypertension. PubMed, Web of Science, China National Knowledge Infrastructure (CNKI), WANFANG MED ONLINE, and Chinese Scientific Journals Full-Text Databases (VIP) were searched; in addition, two related studies were added manually. In total, 7 observational studies were identified, the pooled odds ratios (ORs) for hypertension between high and reference fluoride exposure groups were calculated, and the pooled standardized weighted mean difference (SMD) of systolic blood pressure (SBP) and diastolic blood pressure (DBP) was estimated using an inverse-variance weighted random-effects model; next, sensitivity analysis and subgroup analysis were used to assess potential sources of heterogeneity; furthermore, publication bias was assessed using the Begg and Egger test. In brief, there were no statistical differences between exposure groups and control groups in terms of blood pressure or hypertension when all included studies considered. However, subgroup analysis indicated that blood pressure will rise with the increase of fluoride exposure concentrations in endemic fluorosis areas. The corresponding pooled SMD estimates were 0.31 (95% CI 0.11, 0.51) and 0.27 (95% CI 0.11, 0.43) for SBP and DBP. Funnel plots suggested no asymmetry. Our findings support the possibility of a positive correlation between fluoride exposure and blood pressure in endemic fluorosis areas. Additional evidence is needed to assess the dose-response relationship between fluoride exposure and blood pressure.
Collapse
Affiliation(s)
- Meng Li
- School of Public Health, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Yannan Zhao
- School of Public Health, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Xiaolin Tian
- School of Public Health, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
- Shanxi Key Laboratory of Ecological Animal Science and Environmental Veterinary Medicine, Shanxi Agricultural University, Taigu, 030801, Shanxi, China
| | - Penghui Liu
- School of Public Health, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Jiaxin Xie
- School of Public Health, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Nisha Dong
- School of Public Health, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Jing Feng
- Shanxi Key Laboratory of Experimental Animal and Human Disease Animal Models, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Yi Gao
- School of Public Health, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Ye Fan
- School of Public Health, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Yulan Qiu
- School of Public Health, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Fengjie Tian
- School of Public Health, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Xiaoyan Yan
- School of Public Health, Shanxi Medical University, Taiyuan, 030001, Shanxi, China.
| |
Collapse
|
7
|
Temperature-adjusted hypertension prevalence and control rate: a series of cross-sectional studies in Guangdong Province, China. J Hypertens 2020; 39:911-918. [PMID: 33273194 DOI: 10.1097/hjh.0000000000002738] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Previous studies have shown negative relationships between ambient temperature and blood pressure (BP). However, few studies estimated temperature-adjusted hypertension prevalence and control rate in different population. OBJECTIVE To estimate the effects of temperature on BP, and further calculate temperature-adjusted hypertension prevalence and control rate. METHODS Meteorological and BP data in Guangdong Province from 2004 to 2015 were collected. There were 31 351 participants aged 18 years and over. Based on 2018 European society Arterial Hypertension Guidelines, participants were divided into normotensive patients (n = 23 046), known hypertensive patients (n = 2807), and newly detected hypertensive patients (n = 5498). We first used generalized additive model to establish the nonlinear relationship between daily mean temperature and BP, and then calculated the linear effects of temperature on BP among populations with different hypertension status. Finally, we calculated the temperature-adjusted hypertension prevalence and control rate. RESULTS Generally, there is an inverse relationship between temperature and BP. For a 1 °C increase in temperature, the decreased SBPs for normotensive patients, newly detected hypertensive patients, and known hypertensive patients were 0.37 [95% confidence interval (CI): -0.40, -0.33] mmHg, 0.21 (95% CI: -0.32, -0.10) mmHg and 0.81 (95% CI: -1.02, -0.59) mmHg, while reduced DBPs were 0.19 (95% CI: -0.21, -0.16) mmHg, 0.01 (95% CI: -0.06,0.08) mmHg, and 0.44 (95% CI: -0.56, -0.32) mmHg, respectively. At 5, 10, 15, 20, and 25 °C, the hypertension prevalence rates were 32.5, 29.7, 27.7, 26.0, and 25.0%, respectively, and the control rates were 12.0, 17.5, 23.5, 30.1, and 37.1%, respectively. CONCLUSION Low temperature increased BP for all populations, especially for known hypertensive patients, which makes hypertension prevalence increase and control rate decrease if temperature reduce. Our findings suggest that temperature should be considered in hypertension clinic management and epidemiological survey.
Collapse
|
8
|
Polcaro-Pichet S, Kosatsky T, Potter BJ, Bilodeau-Bertrand M, Auger N. Effects of cold temperature and snowfall on stroke mortality: A case-crossover analysis. ENVIRONMENT INTERNATIONAL 2019; 126:89-95. [PMID: 30784804 DOI: 10.1016/j.envint.2019.02.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 02/11/2019] [Accepted: 02/11/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND We sought to determine if cold temperature and snowfall are independently associated with stroke mortality, and whether effects differ between hemorrhagic and ischemic stroke. MATERIALS AND METHODS We conducted a case-crossover study of 13,201 stroke deaths utilizing weather records between the months of November and April for Quebec, Canada from 1981 to 2015. We compared exposure to cold temperature and snowfall with controls days when stroke death did not occur. We computed odds ratios (OR) and 95% confidence intervals (CI) for the association of minimum temperature and duration of snowfall with stroke, adjusted for change in barometric pressure and relative humidity. RESULTS The likelihood of mortality the day following exposure to cold temperature was elevated for hemorrhagic stroke in men, independent of snowfall. Relative to 0 °C, a temperature of -20 °C was associated with 1.17 times the odds of hemorrhagic stroke death (95% CI 1.04-1.32). An independent effect of snowfall was also present in men, with 12 h of snowfall associated with 1.12 times the odds of hemorrhagic stroke death (95% CI 1.00-1.24) compared with no snowfall. There was no evidence of an increased risk in women. Cold temperature and snowfall were not associated with ischemic stroke death in either men or women. CONCLUSION Our results suggest that cold temperature and snowfall are independent risk factors for death from hemorrhagic stroke in men. These findings imply that interventions to prevent fatal hemorrhagic stroke during winter should include both cold temperature exposure and snowfall in men.
Collapse
Affiliation(s)
- Sara Polcaro-Pichet
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada; Institut national de santé publique du Québec, Montreal, Quebec, Canada
| | - Tom Kosatsky
- National Collaborating Centre for Environmental Health, British Columbia Centre for Disease Control, Vancouver, Canada
| | - Brian J Potter
- University of Montreal Hospital Research Centre, Montreal, Quebec, Canada; Department of Cardiology, University of Montreal Hospital Center, Montreal, Quebec, Canada
| | | | - Nathalie Auger
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada; Institut national de santé publique du Québec, Montreal, Quebec, Canada; University of Montreal Hospital Research Centre, Montreal, Quebec, Canada.
| |
Collapse
|
9
|
Abstract
BACKGROUND Vitamin D deficiency/insufficiency is associated with hypertension. Blood pressure (BP) and circulating vitamin D concentrations vary with the seasons and distance from the equator suggesting BP varies inversely with the sunshine available (insolation) for cutaneous vitamin D photosynthesis. METHODS To determine if the association between insolation and BP is partly explained by vitamin D, we evaluated 1104 participants in the Reasons for Racial and Geographic Differences in Stroke study whose BP and plasma 25-hydroxyvitamin D [25(OH)D] concentrations were measured. RESULTS We found a significant inverse association between SBP and 25(OH)D concentration and an inverse association between insolation and BP in unadjusted analyses. After adjusting for other confounding variables, the association of solar insolation and BP was augmented, -0.3.5 ± SEM 0.01 mmHg/1 SD higher solar insolation, P = 0.01. The greatest of effects of insolation on SBP were observed in whites (-5.2 ± SEM 0.92 mmHg/1 SD higher solar insolation, P = 0.005) and in women (-3.8 ± SEM 1.7 mmHg, P = 0.024). We found that adjusting for 25(OH)D had no effect on the association of solar insolation with SBP. CONCLUSION We conclude that although 25(OH)D concentration is inversely associated with SBP, it did not explain the association of greater sunlight exposure with lower BP.
Collapse
|
10
|
Wang S, Li M, Hua Z, Ye C, Jiang S, Wang Z, Song Z, Yu Y. Outdoor temperature and temperature maintenance associated with blood pressure in 438,811 Chinese adults. Blood Press 2017; 26:246-254. [DOI: 10.1080/08037051.2017.1297676] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Shuojia Wang
- Department of Epidemiology & Health Statistics, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Minchao Li
- Department of Epidemiology & Health Statistics, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Zhengjiang Hua
- Hangzhou Meteorological Bureau, Hangzhou, Zhejiang, China
| | - Chun Ye
- Hangzhou Meteorological Bureau, Hangzhou, Zhejiang, China
| | - Shuying Jiang
- Department of Epidemiology & Health Statistics, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Zhaopin Wang
- Department of Epidemiology & Health Statistics, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Zhenya Song
- Department of International Health Care Center, The Second Affiliated Hospital ZheJiang University College of Medicine, Hangzhou, Zhejiang, China
| | - Yunxian Yu
- Department of Epidemiology & Health Statistics, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| |
Collapse
|
11
|
Thomas LC, Makaroff AP, Oldmeadow C, Attia JR, Levi CR. Seasonal variation in cervical artery dissection in the Hunter New England region, New South Wales, Australia: A retrospective cohort study. Musculoskelet Sci Pract 2017; 27:106-111. [PMID: 27852529 DOI: 10.1016/j.math.2016.10.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 10/17/2016] [Accepted: 10/19/2016] [Indexed: 11/30/2022]
Abstract
BACKGROUND Cervical artery dissection (CAD) is a leading cause of ischemic stroke among middle aged adults, yet the aetiology remains poorly understood. There are reports from colder northern hemisphere sites of a seasonal pattern in the incidence of CAD. Seasonality may suggest some transient putative pro-inflammatory mechanism but it is unknown whether this also exists in temperate climates. AIMS To investigate the seasonal variation in incidence of CAD in the xx Region, Australia, and to compare seasonal incidence and selected clinical features between cases of carotid and vertebral artery dissection. METHODS This retrospective observational study investigated seasonal variation in CAD from a regional stroke register between 2006 and 2014. Clinical features and site of dissection were dichotomized into autumn-winter and spring-summer groups and compared with Chi2 analysis. RESULTS 61 CAD events were identified. A strong trend was identified for CAD to occur more frequently in autumn-winter compared to spring-summer (38, 62.30% vs. 23, 37.70%; p = 0.054). Males were significantly more likely to present with vertebral artery dissection (VAD) than females (27, 73.0% vs 10, 41.7%; p = 0.014). A history of mild trauma was more common in VAD than internal carotid artery dissection (ICAD) (14, 41.2% vs 3, 13.0%; p = 0.023). Cases of VAD were more likely to have had an elevated white cell count than ICAD (16, 47.1% vs 5, 20.8%; p = 0.041). CONCLUSIONS The findings suggest seasonal variation in the CAD incidence in a temperate region of Australia. Clinicians should be vigilant for CAD or risk of CAD during the colder months.
Collapse
Affiliation(s)
- Lucy C Thomas
- Faculty of Health and Medicine, The University of Newcastle, Australia; Faculty of Health and Rehabilitation Sciences, The University of Queensland, Australia.
| | - Andrew P Makaroff
- Faculty of Health and Medicine, The University of Newcastle, Australia
| | | | - John R Attia
- Faculty of Health and Medicine, The University of Newcastle, Australia; Hunter Medical Research Institute, Newcastle, Australia
| | - Christopher R Levi
- Faculty of Health and Medicine, The University of Newcastle, Australia; Hunter Medical Research Institute, Newcastle, Australia
| |
Collapse
|
12
|
Ramkissoon CM, Aufderheide B, Bequette BW, Vehi J. A Review of Safety and Hazards Associated With the Artificial Pancreas. IEEE Rev Biomed Eng 2017; 10:44-62. [DOI: 10.1109/rbme.2017.2749038] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
13
|
Wang Q, Li C, Guo Y, Barnett AG, Tong S, Phung D, Chu C, Dear K, Wang X, Huang C. Environmental ambient temperature and blood pressure in adults: A systematic review and meta-analysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 575:276-286. [PMID: 27750133 DOI: 10.1016/j.scitotenv.2016.10.019] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 09/23/2016] [Accepted: 10/03/2016] [Indexed: 05/15/2023]
Abstract
OBJECTIVE Although many individual studies have examined the association between temperature and blood pressure (BP), they used different methods and also their results were somewhat inconsistent. The aims of this study are to quantitatively summarize previous studies and to systematically assess the methodological issues to make recommendations for future research. METHODS We searched relevant empirical studies published before January 2016 concerning temperature and BP among adults using the MEDLINE, Embase and PubMed databases. Mean changes in systolic (SBP) and diastolic blood pressure (DBP) per 1°C reduction in temperature were pooled using a random-effects meta-analysis. RESULTS Of 23 studies included, 14 were used for meta-analysis. Consistent, statistically significant, inverse associations were observed between ambient temperature (mean, maximum, minimum outdoor temperature and indoor temperature) and BP. An 1°C decrease in mean daily outdoor temperature was associated with an increase in SBP and DBP of 0.26mmHg (95% CI: 0.18-0.33) and 0.13 (95% CI: 0.11-0.16), respectively. The increase was greater in people with conditions related to cardiovascular disease. An 1°C decrease in indoor temperature was associated with 0.38mmHg (0.18-0.58) increase in SBP, while the effects on DBP were not estimated due to limited studies. Among the previous studies on temperature-BP relationship, temperature and BP measurements are not accurate enough and statistical methods need to be improved. CONCLUSIONS Lower ambient temperatures seem to increase adults' BP and people with conditions related to cardiovascular disease are more susceptible to drops in temperature. Indoor temperature appeared to have a stronger effect on BP than outdoor temperature. To understand temperature-BP relationship well, a study combining repeated personal temperature exposure and ambulatory BP monitoring, applying improved statistical methods to examine potential non-linear relationship is warranted.
Collapse
Affiliation(s)
- Qiong Wang
- Department of Health Policy and Management, School of Public Health, Sun Yat-sen University, 74 Zhongshan 2nd Road, Guangzhou 510080, China; Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, School of Public Health, Sun Yat-sen University, 74 Zhongshan 2nd Road, Guangzhou 510080, China
| | - Changchang Li
- Department of Health Policy and Management, School of Public Health, Sun Yat-sen University, 74 Zhongshan 2nd Road, Guangzhou 510080, China; Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, School of Public Health, Sun Yat-sen University, 74 Zhongshan 2nd Road, Guangzhou 510080, China
| | - Yanfang Guo
- Department of Chronic Disease Prevention, Bao'an Hospital for Chronic Disease Prevention and Treatment, 99 Wenwei Road, Shenzhen 518101, China
| | - Adrian G Barnett
- School of Public Health and Institute of Health and Biomedical Innovation, Queensland University of Technology, 60 Musk Avenue, Brisbane, Queensland 4059, Australia
| | - Shilu Tong
- School of Public Health and Institute of Health and Biomedical Innovation, Queensland University of Technology, 60 Musk Avenue, Brisbane, Queensland 4059, Australia
| | - Dung Phung
- Center for Environment and Population Health, School of Environment, Griffith University, 170 Kessels Road, Brisbane, Queensland 4111, Australia
| | - Cordia Chu
- Center for Environment and Population Health, School of Environment, Griffith University, 170 Kessels Road, Brisbane, Queensland 4111, Australia
| | - Keith Dear
- Global Health Research Center, Duke Kunshan University, Kunshan, Jiangsu 215316, China
| | - Xuemei Wang
- School of Atmospheric Sciences, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou 510275, China.
| | - Cunrui Huang
- Department of Health Policy and Management, School of Public Health, Sun Yat-sen University, 74 Zhongshan 2nd Road, Guangzhou 510080, China; Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, School of Public Health, Sun Yat-sen University, 74 Zhongshan 2nd Road, Guangzhou 510080, China; Center for Environment and Population Health, School of Environment, Griffith University, 170 Kessels Road, Brisbane, Queensland 4111, Australia.
| |
Collapse
|
14
|
Cai J, Meng X, Wang C, Chen R, Zhou J, Xu X, Ha S, Zhao Z, Kan H. The cold effects on circulatory inflammation, thrombosis and vasoconstriction in type 2 diabetic patients. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 568:271-277. [PMID: 27295598 DOI: 10.1016/j.scitotenv.2016.06.030] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 05/09/2016] [Accepted: 06/06/2016] [Indexed: 05/27/2023]
Abstract
Short-term associations between temperature variation and adverse cardiovascular outcomes have been well documented. However, it remains unclear whether these temperature-related cardiovascular effects are reflected in circulating biomarkers. We aimed to examine the associations between ambient temperature and circulating biomarkers of inflammation, coagulation and vasoconstriction. We collected 207 blood samples from a panel of 35 type 2 diabetes mellitus patients. Sixteen biomarkers of inflammation, coagulation and vasoconstriction were repeatedly measured over six follow-ups. The short-term associations between air temperature and these biomarkers were assessed by mixed-effect models with controls of demographic characteristics and main air pollutants. We found significant and acute effects of temperature on circulatory biomarkers occurred as early as 3h after exposure, peaked at 25-48h and lasted until 72h after exposure. For example, a 1°C decrease in the 25-48h average of air temperature was associated with 2.2%-15.1% increases in biomarkers of inflammation, 1.4%-24.5% of coagulation and 8.2% of vasoconstriction. Our results provided significant evidence that a temperature decline results in a response in biomarkers of inflammation, coagulation and vasoconstriction biomarkers, suggesting them to be the potential biologic mechanisms underlying the cardiovascular effects of temperature variation, and may have implications for disease prevention.
Collapse
Affiliation(s)
- Jing Cai
- School of Public Health, Key Laboratory of Public Health Safety of the Ministry of Education and Key Laboratory of Health Technology Assessment of the Ministry of Health, Fudan University, Shanghai, China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP(3)), Fudan University, Shanghai, China
| | - Xia Meng
- School of Public Health, Key Laboratory of Public Health Safety of the Ministry of Education and Key Laboratory of Health Technology Assessment of the Ministry of Health, Fudan University, Shanghai, China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP(3)), Fudan University, Shanghai, China
| | - Cuicui Wang
- School of Public Health, Key Laboratory of Public Health Safety of the Ministry of Education and Key Laboratory of Health Technology Assessment of the Ministry of Health, Fudan University, Shanghai, China
| | - Renjie Chen
- School of Public Health, Key Laboratory of Public Health Safety of the Ministry of Education and Key Laboratory of Health Technology Assessment of the Ministry of Health, Fudan University, Shanghai, China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP(3)), Fudan University, Shanghai, China
| | - Ji Zhou
- Shanghai Key Laboratory of Meteorology and Health, Shanghai, China
| | - Xiaohui Xu
- Department of Epidemiology, College of Public Health and Health Professions and College of Medicine, University of Florida, Gainesville, FL, USA
| | - Sandie Ha
- Department of Epidemiology, College of Public Health and Health Professions and College of Medicine, University of Florida, Gainesville, FL, USA
| | - Zhuohui Zhao
- School of Public Health, Key Laboratory of Public Health Safety of the Ministry of Education and Key Laboratory of Health Technology Assessment of the Ministry of Health, Fudan University, Shanghai, China
| | - Haidong Kan
- School of Public Health, Key Laboratory of Public Health Safety of the Ministry of Education and Key Laboratory of Health Technology Assessment of the Ministry of Health, Fudan University, Shanghai, China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP(3)), Fudan University, Shanghai, China.
| |
Collapse
|
15
|
Effects of Forest Bathing on Cardiovascular and Metabolic Parameters in Middle-Aged Males. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2016; 2016:2587381. [PMID: 27493670 PMCID: PMC4963577 DOI: 10.1155/2016/2587381] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 06/02/2016] [Accepted: 06/08/2016] [Indexed: 11/17/2022]
Abstract
In the present study, we investigated the effects of a forest bathing on cardiovascular and metabolic parameters. Nineteen middle-aged male subjects were selected after they provided informed consent. These subjects took day trips to a forest park in Agematsu, Nagano Prefecture, and to an urban area of Nagano Prefecture as control in August 2015. On both trips, they walked 2.6 km for 80 min each in the morning and afternoon on Saturdays. Blood and urine were sampled before and after each trip. Cardiovascular and metabolic parameters were measured. Blood pressure and pulse rate were measured during the trips. The Japanese version of the profile of mood states (POMS) test was conducted before, during, and after the trips. Ambient temperature and humidity were monitored during the trips. The forest bathing program significantly reduced pulse rate and significantly increased the score for vigor and decreased the scores for depression, fatigue, anxiety, and confusion. Urinary adrenaline after forest bathing showed a tendency toward decrease. Urinary dopamine after forest bathing was significantly lower than that after urban area walking, suggesting the relaxing effect of the forest bathing. Serum adiponectin after the forest bathing was significantly greater than that after urban area walking.
Collapse
|
16
|
Mirowsky J, Gordon T. Noninvasive effects measurements for air pollution human studies: methods, analysis, and implications. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2015; 25:354-80. [PMID: 25605444 PMCID: PMC6659729 DOI: 10.1038/jes.2014.93] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 09/26/2014] [Accepted: 11/05/2014] [Indexed: 05/09/2023]
Abstract
Human exposure studies, compared with cell and animal models, are heavily relied upon to study the associations between health effects in humans and air pollutant inhalation. Human studies vary in exposure methodology, with some work conducted in controlled settings, whereas other studies are conducted in ambient environments. Human studies can also vary in the health metrics explored, as there exists a myriad of health effect end points commonly measured. In this review, we compiled mini reviews of the most commonly used noninvasive health effect end points that are suitable for panel studies of air pollution, broken into cardiovascular end points, respiratory end points, and biomarkers of effect from biological specimens. Pertinent information regarding each health end point and the suggested methods for mobile collection in the field are assessed. In addition, the clinical implications for each health end point are summarized, along with the factors identified that can modify each measurement. Finally, the important research findings regarding each health end point and air pollutant exposures were reviewed. It appeared that most of the adverse health effects end points explored were found to positively correlate with pollutant levels, although differences in study design, pollutants measured, and study population were found to influence the magnitude of these effects. Thus, this review is intended to act as a guide for researchers interested in conducting human exposure studies of air pollutants while in the field, although there can be a wider application for using these end points in many epidemiological study designs.
Collapse
Affiliation(s)
- Jaime Mirowsky
- Department of Environmental Medicine, New York University School of Medicine, Nelson Institute of Environmental Medicine, Tuxedo, New York, USA
| | - Terry Gordon
- Department of Environmental Medicine, New York University School of Medicine, Nelson Institute of Environmental Medicine, Tuxedo, New York, USA
| |
Collapse
|
17
|
Giang PN, Dung DV, Bao Giang K, Vinhc HV, Rocklöv J. The effect of temperature on cardiovascular disease hospital admissions among elderly people in Thai Nguyen Province, Vietnam. Glob Health Action 2014; 7:23649. [PMID: 25511886 PMCID: PMC4265648 DOI: 10.3402/gha.v7.23649] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Revised: 07/17/2014] [Accepted: 07/25/2014] [Indexed: 11/27/2022] Open
Abstract
Background Projected increases in weather variability due to climate change will have severe consequences on human health, increasing mortality, and disease rates. Among these, cardiovascular diseases (CVD), highly prevalent among the elderly, have been shown to be sensitive to extreme temperatures and heat waves. Objectives This study aimed to find out the relationship between daily temperature (and other weather parameters) and daily CVD hospital admissions among the elderly population in Thai Nguyen province, a northern province of Vietnam. Methods Retrospective data of CVD cases were obtained from a data base of four hospitals in Thai Nguyen province for a period of 5 years from 2008 to 2012. CVD hospital admissions were aggregated by day and merged with daily weather data from this period. Distributed lag non-linear model (DLNM) was used to derive specific estimates of the effect of weather parameters on CVD hospital admissions of up to 30 days, adjusted for time trends using b-splines, day of the week, and public holidays. Results This study shows that the average point of minimum CVD admissions was at 26°C. Above and below this threshold, the cumulative CVD admission risk over 30 lag days tended to increase with both lower and higher temperatures. The cold effect was found to occur 4–15 days following exposure, peaking at a week's delay. The cumulative effect of cold exposure on CVD admissions was statistically significant with a relative risk of 1.12 (95% confidence interval: 1.01–1.25) for 1°C decrease below the threshold. The cumulative effect of hot temperature on CVD admissions was found to be non-significant and was estimated to be at a relative risk of 1.17 (95% confidence interval: 0.90–1.52) for 1°C increase in the temperature. No significant association was found between CVD admissions and the other weather variables. Conclusion Exposure to cold temperature is associated with increasing CVD admission risk among the elderly population.
Collapse
Affiliation(s)
- Pham Ngan Giang
- Administration of Science technology and Training, Ministry of Health, Hanoi, Vietnam
| | - Do Van Dung
- Department of Medical Statistics, University of Medicine and Pharmacy at Ho Chi Minh city, Ho Chi Minh City, Vietnam;
| | - Kim Bao Giang
- Institute for Preventive Medicine and Public Health, Hanoi Medical University, Hanoi, Vietnam
| | - Hac Van Vinhc
- Faculty of Public Health, University of Medicine and Pharmacy, Thai Nguyen, Vietnam
| | - Joacim Rocklöv
- Epidemiology and Global Health, Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
| |
Collapse
|
18
|
Horiuchi M, Endo J, Takayama N, Murase K, Nishiyama N, Saito H, Fujiwara A. Impact of viewing vs. not viewing a real forest on physiological and psychological responses in the same setting. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2014; 11:10883-901. [PMID: 25333924 PMCID: PMC4211012 DOI: 10.3390/ijerph111010883] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 10/08/2014] [Accepted: 10/14/2014] [Indexed: 12/19/2022]
Abstract
We investigated the impact of viewing versus not viewing a real forest on human subjects’ physiological and psychological responses in the same setting. Fifteen healthy volunteers (11 males, four females, mean age 36 years) participated. Each participant was asked to view a forest while seated in a comfortable chair for 15 min (Forest condition) vs. sitting the same length of time with a curtain obscuring the forest view (Enclosed condition). Both conditions significantly decreased blood pressure (BP) variables, i.e., systolic BP, diastolic BP, and mean arterial pressure between pre and post experimental stimuli, but these reductions showed no difference between conditions. Interestingly, the Forest viewing reduced cerebral oxygenated hemoglobin (HbO2) assessed by near-infrared spectroscopy (NIRS) and improved the subjects’ Profile of Mood States (POMS) scores, whereas the Enclosed condition increased the HbO2 and did not affect the POMS scores. There were no significant differences in saliva amylase or heart rate variability (HRV) between the two conditions. Collectively, these results suggest that viewing a real forest may have a positive effect on cerebral activity and psychological responses. However, both viewing and not viewing the forest had similar effects on cardiovascular responses such as BP variables and HRV.
Collapse
Affiliation(s)
- Masahiro Horiuchi
- Division of Human Environmental Science, Mt. Fuji Research Institute, 5597-1, Kami-Yoshida, Fuji-Yoshida City, Yamanashi 4030005, Japan.
| | - Junko Endo
- Division of Human Environmental Science, Mt. Fuji Research Institute, 5597-1, Kami-Yoshida, Fuji-Yoshida City, Yamanashi 4030005, Japan.
| | - Norimasa Takayama
- Department of Forest Management, Forestry and Forest Products Research Institute, 1 Matsuno-sato, Tsukuba City, Ibaraki 305-8687, Japan.
| | - Kazutaka Murase
- Fuji Iyashinomoroi Woodland Study Center, The University of Tokyo, Yamanaka 341-2, Yamanakako Village, Minami-tsuru, Yamanashi 4010501, Japan.
| | - Norio Nishiyama
- Fuji Iyashinomoroi Woodland Study Center, The University of Tokyo, Yamanaka 341-2, Yamanakako Village, Minami-tsuru, Yamanashi 4010501, Japan.
| | - Haruo Saito
- Fuji Iyashinomoroi Woodland Study Center, The University of Tokyo, Yamanaka 341-2, Yamanakako Village, Minami-tsuru, Yamanashi 4010501, Japan.
| | - Akio Fujiwara
- Fuji Iyashinomoroi Woodland Study Center, The University of Tokyo, Yamanaka 341-2, Yamanakako Village, Minami-tsuru, Yamanashi 4010501, Japan.
| |
Collapse
|
19
|
Ponjoan A, García-Gil MM, Martí R, Comas-Cufí M, Alves-i-Cabratosa L, Sala J, Marrugat J, Elosua R, de Tuero GC, Grau M, Ramos R. Derivation and validation of BOREAS, a risk score identifying candidates to develop cold-induced hypertension. ENVIRONMENTAL RESEARCH 2014; 132:190-196. [PMID: 24792416 DOI: 10.1016/j.envres.2014.03.039] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 03/24/2014] [Accepted: 03/25/2014] [Indexed: 06/03/2023]
Abstract
INTRODUCTION Blood pressure increases in cold periods, but its implications on prevalence of hypertension and on individual progression to hypertension remain unclear. Our aim was to develop a pre-screening test for identifying candidates to suffer hypertension only in cold months among non-hypertensive subjects. METHODS We included 95,277 subjects registered on a primary care database from Girona (Catalonia, Spain), with ≥ 3 blood pressure measures recorded between 2003 and 2009 and distributed in both cold (October-March) and warm (April-September) periods. We defined four blood pressure patterns depending on the presence of hypertension through these periods. A Cox model determined the risk to develop vascular events associated with blood pressure patterns. A logistic regression distinguished those nonhypertensive individuals who are more prone to suffer cold-induced hypertension. Validity was assessed on the basis of calibration (using Brier score) and discrimination (using the area under the receiver operating characteristics). RESULTS In cold months, the mean systolic blood pressure increased by 3.3 ± 0.1 mmHg and prevalence of hypertension increased by 8.2%. Cold-induced hypertension patients were at higher vascular events risk (Hazard ratio=1.44 [95% Confidence interval 1.15-1.81]), than nonhypertensive individuals. We identified age, diabetes, body mass index and prehypertension as the major contributing factors to cold-induced hypertension onset. DISCUSSION Hypertension follows a seasonal pattern in some individuals. We recommend screening for hypertension during the cold months, at least in those nonhypertensive individuals identified as cold-induced hypertensive by this assessment tool.
Collapse
Affiliation(s)
- A Ponjoan
- Research Unit, Family Medicine, Girona. Jordi Gol Institute for Primary Care Research (IDIAP Jordi Gol), Catalonia, Spain; Girona Biomedical Research Institute (IDIBGI), Dr. Trueta University Hospital, Catalonia, Spain
| | - M M García-Gil
- Research Unit, Family Medicine, Girona. Jordi Gol Institute for Primary Care Research (IDIAP Jordi Gol), Catalonia, Spain; Primary Care Services, Girona. Catalan Institute of Health (ICS), Catalonia, Spain; Translab Research Group. Department of Medical Sciences, School of Medicine, University of Girona, Spain
| | - R Martí
- Research Unit, Family Medicine, Girona. Jordi Gol Institute for Primary Care Research (IDIAP Jordi Gol), Catalonia, Spain; Girona Biomedical Research Institute (IDIBGI), Dr. Trueta University Hospital, Catalonia, Spain
| | - M Comas-Cufí
- Research Unit, Family Medicine, Girona. Jordi Gol Institute for Primary Care Research (IDIAP Jordi Gol), Catalonia, Spain
| | - L Alves-i-Cabratosa
- Research Unit, Family Medicine, Girona. Jordi Gol Institute for Primary Care Research (IDIAP Jordi Gol), Catalonia, Spain
| | - J Sala
- Girona Biomedical Research Institute (IDIBGI), Dr. Trueta University Hospital, Catalonia, Spain; Primary Care Services, Girona. Catalan Institute of Health (ICS), Catalonia, Spain; Translab Research Group. Department of Medical Sciences, School of Medicine, University of Girona, Spain
| | - J Marrugat
- Research on Inflammatory and Cardiovascular Disorders Program (RICAD), Lipids and Cardiovascular Epidemiology Research Group (ULEC) and Cardiovascular, Epidemiology and Genetics Research Group (EGEC), Municipal Institute for Medical Research (IMIM), Barcelona, Spain
| | - R Elosua
- Research on Inflammatory and Cardiovascular Disorders Program (RICAD), Lipids and Cardiovascular Epidemiology Research Group (ULEC) and Cardiovascular, Epidemiology and Genetics Research Group (EGEC), Municipal Institute for Medical Research (IMIM), Barcelona, Spain
| | - G Coll de Tuero
- Translab Research Group. Department of Medical Sciences, School of Medicine, University of Girona, Spain; Research Unit, Healthcare Institute (IAS), Salt, Girona, Spain
| | - M Grau
- Research on Inflammatory and Cardiovascular Disorders Program (RICAD), Lipids and Cardiovascular Epidemiology Research Group (ULEC) and Cardiovascular, Epidemiology and Genetics Research Group (EGEC), Municipal Institute for Medical Research (IMIM), Barcelona, Spain
| | - R Ramos
- Research Unit, Family Medicine, Girona. Jordi Gol Institute for Primary Care Research (IDIAP Jordi Gol), Catalonia, Spain; Girona Biomedical Research Institute (IDIBGI), Dr. Trueta University Hospital, Catalonia, Spain; Primary Care Services, Girona. Catalan Institute of Health (ICS), Catalonia, Spain; Translab Research Group. Department of Medical Sciences, School of Medicine, University of Girona, Spain.
| |
Collapse
|
20
|
Abstract
Hypertension exhibits a winter peak and summer trough in countries both north and south of the equator. A variety of explanations have been proposed to account for the seasonal nature of hypertension. It is likely that this reflects seasonal variations in risk factors. Seasonal variations have been demonstrated in a number of risk factors may play essential roles for seasonality of hypertension such as noradrenalin, catecholamine and vasopressin, vitamin D, and serum cholesterol. However, a number of studies have also suggested a direct effect of environmental temperature and physical activity on blood pressure. This paper was design to review the available evidence on seasonal variations in hypertension and possible explanations for them.
Collapse
Affiliation(s)
- Auda Fares
- Correspondence: Auda Fares, Albert-Schlangen Str.36, 50181 Bedburg, Germany, Tel: 004917625529330,
| |
Collapse
|
21
|
Identification of RAS genotypes that modulate blood pressure change by outdoor temperature. Hypertens Res 2013; 36:540-5. [DOI: 10.1038/hr.2012.218] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
22
|
Hong YC, Kim H, Oh SY, Lim YH, Kim SY, Yoon HJ, Park M. Association of cold ambient temperature and cardiovascular markers. THE SCIENCE OF THE TOTAL ENVIRONMENT 2012; 435-436:74-9. [PMID: 22846766 DOI: 10.1016/j.scitotenv.2012.02.070] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2011] [Revised: 02/24/2012] [Accepted: 02/27/2012] [Indexed: 04/14/2023]
Abstract
Cardiovascular mortality has been shown to increase in the winter. However, it is unclear whether cold temperature affects indicators known as cardiovascular markers. We evaluated the association between ambient temperature and cardiovascular markers using data collected retrospectively from 55,567 adults who had visited a health check-up clinic between 1995 and 2008. Non-parametric smoothing regressions were fitted to determine the shapes of association between temperature and cardiovascular markers such as blood pressure, lipid profiles, platelet count, and high sensitivity C-reactive protein (hsCRP). Mixed effect model was used to investigate the significance of the relationship between temperature and cardiovascular markers. Decreased ambient temperature was associated with an increase in systolic and diastolic blood pressures, platelet count and serum low density lipoprotein-cholesterol concentration. In contrast, high density lipoprotein-cholesterol level declined with decreasing temperature. The hsCRP level increased with decreasing temperature in the minimum temperatures below 0°C, but revealed a reverse association above. Our study suggests that excess cardiovascular mortality in cold weather might be associated with temperature-related variations of cardiovascular markers.
Collapse
Affiliation(s)
- Yun-Chul Hong
- Department of Preventive Medicine, Seoul National University College of Medicine, 28 Yongon-Dong, Chongno-Gu, Seoul 110-799, South Korea
| | | | | | | | | | | | | |
Collapse
|
23
|
Tochihara Y, Hashiguchi N, Yadoguchi I, Kaji Y, Shoyama S. Effects of Room Temperature on Physiological and Subjective Responses to Bathing in the Elderly. ACTA ACUST UNITED AC 2012. [DOI: 10.1618/jhes.15.13] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Yutaka Tochihara
- Department of Human Science, Faculty of Design, Kyushu University
| | - Nobuko Hashiguchi
- Department of Health Science, Faculty of Medicine, Kyushu University
| | | | - Yumi Kaji
- Department of Internal Medicine, LA⋅PAZ Hospital
| | | |
Collapse
|
24
|
Yokokawa H, Goto A, Sanada H, Watanabe T, Yasumura S. Longitudinal Community-Based Assessment of Blood Pressure Control Among Japanese Hypertensive Patients: Fukushima Research of Hypertension (FRESH). J Clin Hypertens (Greenwich) 2010; 12:166-73. [DOI: 10.1111/j.1751-7176.2009.00242.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
25
|
Hayashi T, Ohshige K, Sawai A, Yamasue K, Tochikubo O. Seasonal influence on blood pressure in elderly normotensive subjects. Hypertens Res 2008; 31:569-74. [PMID: 18497478 DOI: 10.1291/hypres.31.569] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The aim of this study was to examine whether or not fluctuations in blood pressure (BP) differ by season. Subjects were 45 elderly individuals (20 men and 25 women; mean age, 66.5+/-4.9 [SD] years). Each subject's BP was recorded with an ambulatory BP monitoring device for 24 h during each of the four seasons. Subjects also wore a portable weather meter to obtain ambient temperature, relative humidity, and barometric pressure simultaneously with BP. The relationships between meteorologic values and BP were investigated at various parts of the day. Seasonal differences in BP fluctuation around wake-up-time were analyzed by means of the Tukey's test. The difference between the pre-wake-up-time systolic BP and the wake-up-time systolic BP was significantly greater in winter than in summer (8.7 mmHg greater, p<0.001). The difference between pre-wake-up-time and wake-up-time systolic BP was significantly greater in autumn than in spring (9.4 mmHg greater, p<0.001) or summer (13.1 mmHg greater, p<0.001). The difference between pre-wake-up-time heart rate and wake-up-time heart rate did not differ statistically between seasons. In conclusion, the present study showed that the difference between pre-wake-up-time systolic BP and wake-up-time systolic BP was greatest in the colder seasons, i.e., autumn and winter. There appears to be a large fluctuation in wake-up-time in the colder seasons. Low ambient temperature likely induces this large fluctuation.
Collapse
Affiliation(s)
- Tomohito Hayashi
- Department of Preventive Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan.
| | | | | | | | | |
Collapse
|
26
|
Youn JC, Rim SJ, Park S, Ko YG, Kang SM, Choi D, Ha JW, Jang Y, Chung N. Arterial stiffness is related to augmented seasonal variation of blood pressure in hypertensive patients. Blood Press 2008; 16:375-80. [PMID: 18058455 DOI: 10.1080/08037050701642618] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Seasonal variation in blood pressure (BP), a usual tendency of both systolic (SBP) and diastolic BP (DBP) to rise during winter in hypertensive patients, may be related to the higher cardiovascular mortality in winter. However, it is not yet clear what factors are relevant to the seasonal BP changes. We hypothesized that arterial stiffness is related to the BP changes between summer and winter. METHODS AND RESULTS Eighty-five elderly (>55 years) patients with essential hypertension (33 males, 64+/-6.0 years) were enrolled. Seasonal BP profiles over at least 2 years were studied along with arterial stiffness and clinical variables (age, gender, smoking, duration of hypertension, anti-hypertensive medications and body mass index). Both SBP and DBP were significantly higher during winter compared with three other seasons (spring 128+/-10.0/79+/-7.3 mmHg, summer 127+/-9.8/78+/-7.1 mmHg, autumn 127+/-10.3/78+/-8.0 mmHg, winter 136+/-12.5/81+/-7.6 mmHg; SBP changes; p<0.001, DBP changes; p<0.001). There were no significant seasonal differences among spring, summer and autumn. Pulse wave velocity (PWV), a widely used clinical indicator of arterial stiffness was correlated with winter-summer differences in SBP (r = 0.272, p = 0.012), but not in DBP (r = 0.188, p = 0.085). Age, which was correlated with PWV strongly (p<0.001), was not significantly related to the seasonal changes in BP (SBP changes; p = 0.114, DBP changes; p = 0.298). No other clinical variables had significant correlation with seasonal BP changes. Multivariate regression analysis revealed that PWV is the only significant predictor for winter-summer SBP changes. CONCLUSIONS Our results established a feasible link between arterial stiffness and seasonal BP variation. These findings may partly explain higher cardiovascular risk in patients with increased arterial stiffness.
Collapse
Affiliation(s)
- Jong-Chan Youn
- Division of Cardiology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Affiliation(s)
- Se-Joong Rim
- Cardiology Division, Yongdong Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| |
Collapse
|
28
|
Barnett AG, Sans S, Salomaa V, Kuulasmaa K, Dobson AJ. The effect of temperature on systolic blood pressure. Blood Press Monit 2007; 12:195-203. [PMID: 17496471 DOI: 10.1097/mbp.0b013e3280b083f4] [Citation(s) in RCA: 140] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVES To quantify the association between systolic blood pressure and season, indoor and outdoor temperature and short-term trends in outdoor temperature. METHODS The study used data from the WHO MONICA Project risk factors surveys from 25 populations in 16 countries. Random samples of men and women aged 35-64 years were invited to participate. Systolic blood pressure measurements were available for 115 434 participants. Hierarchical models were used to quantify the association between blood pressure and temperature, and account for differences in the associations between populations. RESULTS Populations closer to the equator showed larger seasonal changes in blood pressure. A 1 degrees C increase in indoor temperature reduced systolic blood pressure by an average of 0.31 mmHg (95% posterior interval: -0.44, -0.19). A 1 degrees C increase in outdoor temperature reduced blood pressure by the smaller average of 0.19 mmHg (95% posterior interval: -0.26, -0.11). Increased outdoor, but not indoor, temperatures had a stronger effect in women than in men. The effect of outdoor temperature remained after controlling for indoor temperature. Short-term trends in temperature did not have a statistically signicant effect. CONCLUSIONS Indoor and outdoor temperature have independent effects on systolic blood pressure, and both should be controlled for in studies that measure blood pressure. Improved protection against cold temperatures could lead to a reduction in the winter excess of cardiovascular mortality.
Collapse
Affiliation(s)
- Adrian G Barnett
- School of Population Health, University of Queensland, Herston, Australia.
| | | | | | | | | |
Collapse
|
29
|
Tsukamoto S, Yamaguchi Y, Ueda T, Kajimoto O, Nakazawa Y, Nakagawa S, Kajimoto Y. Hypotensive Effects of Beverages Containing Eucommia Leaf Glycosides on High Normotensive and Mild Hypertensive Subjects. ACTA ACUST UNITED AC 2007. [DOI: 10.3387/iseu.1.47] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
30
|
Perez-Lloret S, Toblli JE, Vigo DE, Cardinali DP, Milei J. Infradian awake and asleep systolic and diastolic blood pressure rhythms in humans. J Hypertens 2006; 24:1273-9. [PMID: 16794475 DOI: 10.1097/01.hjh.0000234106.00745.50] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Blood pressure shows 24-h rhythms with a significant seasonal fluctuation. OBJECTIVES To characterize 2-month to 12-month infradian rhythms in the mean awake and asleep systolic blood pressure (SBP) and diastolic blood pressure (DBP) in humans. METHODS A total of 1689 participants underwent 24-h ambulatory blood pressure monitoring during different periods of the year. The mean daily temperature, humidity, barometric pressure and wind velocity values for the same time span and geographical location were obtained. Fourier analysis was used to fit 12-month, 6-month, 4-month, 3-month and 2-month rhythms to the mean awake and asleep SBP and DBP and to metereological variables. RESULTS The awake mean SBP and DBP values showed significant 12-month and 3-month rhythms (respectively, R2 = 55%, P < 0.001 and R2 = 45% P < 0.001), with a peak in July (winter) and a trough-peak difference of 6.2 +/- 1.6 mmHg (P < 0.001, SBP) and 4.2 +/- 1.5 mmHg (P < 0.001, DBP). In contrast, asleep blood pressure means showed mainly 3-month rhythms (SBP, R2 = 19%, P < 0.02; DBP, R2 = 43% P < 0.02). Mean daily temperature and humidity showed at 12-month, 6-month, 4-month, 3-month and 2-month rhythms, barometric pressure showed 12-month and 6-month rhythms, and wind velocity showed 12-month and 3-month rhythms. Minimal temperature values and maximal humidity values coincided with elevated blood pressure values. CONCLUSION Awake blood pressure means exhibited mainly circannual fluctuations while asleep blood pressure means showed principally 3-month rhythms. Infradian blood pressure variations correlated with some meteorological variables.
Collapse
Affiliation(s)
- Santiago Perez-Lloret
- Instituto de Investigaciones Cardiologicas, Prof. Dr. Alberto C. Taquini, Facultad de Medicina, Universidad de Buenos Aires, Argentina
| | | | | | | | | |
Collapse
|
31
|
Weiss A, Beloosesky Y, Grinblat J, Grossman E. Seasonal changes in orthostatic hypotension among elderly admitted patients. Aging Clin Exp Res 2006; 18:20-4. [PMID: 16608132 DOI: 10.1007/bf03324636] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
BACKGROUND AND AIMS Orthostatic hypotension (OH) is a common finding among older patients. It has been shown that blood pressure (BP) is lower in summer than in winter. The aim of this study was to examine whether OH varies between seasons in the elderly population. METHODS Five hundred and two inpatients (241 males, 261 females) of mean age 81.6 years were included in the study; 253 were studied in summer and 166 in winter. Orthostatic tests were performed 3 times daily, 30 minutes after meals. Orthostatic hypotension was defined as a decrease of at least 20 mmHg in systolic BP and/or 10 mmHg in diastolic BP upon assuming an upright posture at least twice during the day. RESULTS OH was documented in 107 patients (34.8%). Initial BP did not differ between seasons (147.6 +/- 24.6 / 72.6 +/- 14.5 mmHg in summer, 146.7 +/- 23.4 / 71.5 +/- 13.4 mmHg in winter). However, the orthostatic drop in BP in the morning was greater in summer (-8.4 / -2.8 mmHg vs -4.3 / +0.2 mmHg in winter; p < 0.05). OH was also more prevalent in summer than in winter (37.9 vs 27.1%; p = 0.02). After adjustment for all confounders, the risk of experiencing OH in summer was 64% higher than in winter [adjusted odds ratio (OR) 1.64 [95% Confidence Interval (CI) 1.03-2.61]. CONCLUSIONS The prevalence of OH is higher in summer than winter. Thus, more attention should be paid to the diagnosis of OH in summer.
Collapse
Affiliation(s)
- Avraham Weiss
- Geriatric Department, Rabin Medical Center, Beilinson Campus, Petah Tiqva, Israel
| | | | | | | |
Collapse
|
32
|
Naismith DJ, Braschi A. The effect of low-dose potassium supplementation on blood pressure in apparently healthy volunteers. Br J Nutr 2003; 90:53-60. [PMID: 12844375 DOI: 10.1079/bjn2003861] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Epidemiological and clinical trials suggest an inverse relationship between dietary K intake and blood pressure (BP). Most trials however have been of short duration, the dose of K was high, and the results have been conflicting. The aim of the present study was to evaluate the effect on BP of a low-dose supplementation (24 mmol/d) for an extended period. A double-blind placebo-controlled trial was conducted on fifty-nine volunteers, randomly assigned to receive 24 mmol slow-release KCl/d (n 30) or a placebo (n 29). Measures of BP, anthropometric characteristics and urine analysis for electrolytes were recorded during a 1-week baseline period. Supplementation was for 6 weeks during which BP and changes in weight were assessed and a second 24 h urine collection made. The primary outcome was the change in mean arterial pressure (MAP); systolic BP (SBP) and diastolic BP (DBP) were secondary outcomes. After 6 weeks of supplementation MAP was reduced by 7.01 (95 % CI -9.12, -4.89; P<0.001) mmHg, SBP was reduced by 7.60 (95 % CI -10.46, -4.73; P<0.001) mmHg and DBP was reduced by 6.46 (95 % CI -8.74, -4.19; P<0.001) mmHg. The reduction in MAP was positively associated with baseline urinary Na:K (P<0.034). A low daily dietary supplement of K, equivalent to the content of five portions of fresh fruits and vegetables, induced a substantial reduction in MAP, similar in effect to single-drug therapy for hypertension.
Collapse
Affiliation(s)
- Donald J Naismith
- Department of Nutrition and Dietetics, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 8WD, UK.
| | | |
Collapse
|