Seasonal Dynamics of Red Blood Parameters in Healthy People in Regions with Different Types of Climate: a Meta-Analysis

Kuzmenko, N. V.; Цырлин, В. А.; Плисс, М. Г.

doi:10.1134/s0001433821100078

Cited by 7 publications

(6 citation statements)

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“…It confirms dependence of MI risk on an increase in blood pressure. In addition, it has been shown that a decrease in air temperature stimulates an increase in hematocrit and cholesterol levels, the formation of cholesterol plaques, and their rupture [ 4 , 5 , 43 ]. Shibuya et al [ 46 ] report the worst angiographic parameters (minimum vessel lumen, maximum lipid plaque) in patients with acute coronary syndrome in winter.…”

Section: Discussionmentioning

confidence: 99%

“…Besides, in the Brazilian study, an association of an increase in thromboembolism incidents with a decrease in air temperature was revealed [ 66 ]. Moreover, the meta-analysis [ 4 ] showed that hematocrit in humans is higher in winter than in summer, and in regions where atmospheric pressure is significantly lower in summer compared to winter, summer decrease in hematocrit is maximal. There are observations that the initial stage of hypoxia is characterized by a slight decrease in hematocrit due to a lessening in the corpuscular volume of erythrocytes [ 67 ].…”

Section: Discussionmentioning

confidence: 99%

“…Numerous studies have shown that cardiovascular events (CVE) are more common in winter than in summer [2]. This is facilitated by an increase in blood pressure, blood viscosity, and the level of circulating lipids in winter compared to summer [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

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Seasonal dynamics of myocardial infarctions in regions with different types of a climate: a meta-analysis

et al. 2022

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Background It is known that cardiovascular events (CVE) occur more often in winter than in summer. However, dependence of myocardial infarction (MI) risk of on various meteorological factors is still not fully understood. Also, the dependence of the seasonal dynamics of MI on gender and age has not yet been studied. The purpose of our meta-analysis is to reveal dependence of the circannual dynamics of MI hospitalizations on gender, age, and characteristics of a region’s climate. Main body Using Review Manager 5.3, we performed a meta-analysis of 26 publications on the seasonal dynamics of MI. In our meta-analysis, the relative MI risk was higher in colder compared to warmer seasons. Old age insignificantly increased the seasonal MI risk; gender did not affect the seasonal dynamics of MI, but MI was more common in men than in women. The severity of the seasonal dynamics of MI risk depended on the climate of the region. In a climate with a small amplitude of circannual fluctuations in air temperature, atmospheric pressure, and partial oxygen density in the air, as well as in regions where air humidity is higher in winter than in summer, an increase in MI risk in winter compared to summer was significant. It was not significant in regions with opposite climatic tendencies. Conclusions Based on the results of our studies, it can be concluded that a decrease in air temperature increases in MI risk; in addition, hypoxia in the hot season can provoke CVE associated with ischemia.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Seasonal dynamics of myocardial infarctions in regions with different types of a climate: a meta-analysis

et al. 2022

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“…Проведенный анализ литературы позволяет сделать вывод о наличии взаимосвязи декомпенсации ССЗ с сезоном, временем суток и t воздуха [6,7]. На примере ряда исследований было показано, что низкая t воздуха связана с более частым развитием сосудистых катастроф (острый инфаркт миокарда (ОИМ), острое нарушение мозгового кровообращения) из-за физиологических изменений в крови (например, увеличения вязкости и уровня холестерина, повышения АД) [8,9]. Mohammad МА, et al в крупном общенациональном исследовании Швеции показали, что низкая среднесуточная t воздуха связана с риском развития ОИМ [10].…”

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Meteoropathy: myth or reality? Assessment of the relationship between cardiovascular diseases and weather conditions according to data from a Moscow hospital

Drapkina,

Zyryanov,

Shepel

et al. 2024

Cardiovasc Ther Prev

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Many patients and some doctors associate the worsening of cardiovascular diseases with meteoropathy (changes in atmospheric pressure and air temperature). Opinion about lack of weather influence on the increase in overall morbidity and the lack of related research data indicate the need to study the relationship between cardiovascular diseases and meteorological conditions.Aim. To assess the prevalence of hospitalizations with symptomatic increases in blood pressure (BP), atrial fibrillation (AF), and decompensated heart failure (HF) in a Moscow hospital depending on meteorological conditions.Material and methods. This retrospective analysis of the number of emergency hospitalizations of patients with symptomatic increases in blood pressure, AF, and decompensated HF in Moscow City Clinical Hospital № 24 was carried out in the period from October 1, 2018 to September 30, 2019. Information from the website www.weather.com was used as a source of meteorological data. The following indicators were assessed daily: daytime air temperature (t), nighttime air temperature, maximum diurnal air temperature variation, atmospheric pressure, maximum diurnal atmospheric pressure variation, amount of precipitation. To assess statistical significance, the Mann-Whitney and Kruskal-Wallis tests were used. A correlation analysis was carried out, and a prognostic model was created using multiple linear regression.Results. During the period from October 1, 2018 to September 30, 2019, 4354 patients were hospitalized at City Clinical Hospital № 24 with symptomatic BP increase and/or AF and/or decompensated HF. The highest number of hospitalizations occurred in November, December and January. The median number of admissions per day was 12 patients. When comparing the mean number of patients admitted to the hospital per day, depending on day- and nighttime air temperature, following statistically significant differences were obtained (p<0,001): with day- and nighttime air temperature ≥0о C, the number of admissions was less compared to sub-zero temperatures. Significant inverse correlations were established between the number of patients hospitalized with symptomatic BP increase, AF and HF per day, with air temperature at night (correlation coefficient r=-0,339; p<0,001), air t during the day (r=-0,316; p<0,001), temperature difference over 48 hours (r=-0,205; p<0,001); direct correlations with atmospheric pressure (r=0,106; p=0,044) and its changes (r=0,115; p=0,028) were identified. All identified relationships were of moderate strength. According to prognostic model, only nighttime air temperature turned out to be a significant indicator associated with the hospitalization rate per day. With a decrease in air temperature at night for every 7,5о C <0, one more patient is expected to be hospitalized with a symptomatic BP increase, decompensated HF, or paroxysmal AF.Conclusion. Negative air temperature in a metropolis is associated with an increase in hospitalizations for symptomatic BP increase, AF or decompensated HF. Atmospheric pressure and precipitation do not affect these conditions.

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“…The higher platelet count induced by the cold may be a potential cause of high winter cardiovascular disease mortality [ 10 ]. In addition, studies exploring the seasonal fluctuation of blood parameters showed that the changes in hemoglobin were related to temperature fluctuations [ 21 ], and ALT levels increased significantly in winter [ 22 ]. However, further research is needed to quantify the level of changes in blood parameters after exposure to extreme temperature weather, such as heat waves and cold spells.…”

Section: Introductionmentioning

confidence: 99%

Effects of heat waves and cold spells on blood parameters: a cohort study of blood donors in Tianjin, China

Gao,

Liu,

et al. 2024

Environ. Health Prev. Med.

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Background With the increasing occurrence of extreme temperature events due to climate change, the attention has been predominantly focused on the effects of heat waves and cold spells on morbidity and mortality. However, the influence of these temperature extremes on blood parameters has been overlooked. Methods We conducted a cohort study involving 2,752 adult blood donors in Tianjin, China, between January 18, 2013, and June 25, 2021. The generalized additive mixed model was used to investigate the effects and lagged effects of heat waves and cold spells on six blood parameters of blood donors, including alanine aminotransferase (ALT), white blood cell count (WBC), red blood cell count (RBC), hemoglobin (HB), hematocrit (HCT), and platelet count (PLT). Subgroup analyses were stratified by sex, age, and BMI. Results Heat waves and cold spells are associated with changes in blood parameters, particularly HB and PLT. Heat waves increased HB and PLT, while cold spells increased HB and decreased PLT. The effect of heat waves is greater than that of cold spells. The largest effect of heat waves on HB and PLT occurred at lag1 with 2.6 g/L (95% CI : 1.76 to 3.45) and lag7 with 9.71 × 10^9/L (95% CI : 6.26 to 13.17), respectively, while the largest effect of cold spells on HB and PLT occurred at lag0 with 1.02 g/L (95% CI : 0.71 to 1.33) and lag2 with −3.85 × 10^9/L (95% CI : −5.00 to −2.70), respectively. In subgroup analysis, the effect of cold spells on ALT was greater in the 40–49 age group. Conclusion We indicated that heat waves and cold spells can impact hemoglobin and platelet counts in the human body. These findings provide evidence linking heat waves or cold spells to diseases and may reduce health risks caused by extreme temperature events. Supplementary information The online version contains supplementary material available at https://doi.org/10.1265/ehpm.24-00023 .

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Seasonal Dynamics of Red Blood Parameters in Healthy People in Regions with Different Types of Climate: a Meta-Analysis

Cited by 7 publications

References 106 publications

Seasonal dynamics of myocardial infarctions in regions with different types of a climate: a meta-analysis

Seasonal dynamics of myocardial infarctions in regions with different types of a climate: a meta-analysis

Meteoropathy: myth or reality? Assessment of the relationship between cardiovascular diseases and weather conditions according to data from a Moscow hospital

Effects of heat waves and cold spells on blood parameters: a cohort study of blood donors in Tianjin, China

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