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  • Myocardial infarction  (7)
  • 1
    ISSN: 1432-1254
    Keywords: Myocardial infarction ; Aging ; Temperature ; Seasons ; Coronary disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract Mortality from acute myocardial infarction (MI) over the 5 year period 1982–1987 in Brown County, Wisconsin, was analyzed to assess the relationship with environmental temperature. Deaths occurrring on the day of and the day following a significant snowfall as well as deaths occuring in health care facilities were eliminated from consideration because the focus was upon temperature, not snowfall or events within a hospital. These criteria resulted in the inclusion of 1,802 days and 926 cases of acute MI. The mean temperature on the day of death was obtained from climatological data and were grouped into six categories covering a range of temperatures from〈−17.8°C (0°F) to 16.1°C (61°F). The number of deaths in each category was tabulated. The effect of temperature, sex, and age were analyzed by regression analysis. The results indicated a linear increase in mortality as mean daily temperature decreased over the temperature range. The inverse temperature effect was most pronounced in males over the age of 60. These results indicate that cold temperatures appear to be associated with an increased mortality from myocardial infarction.
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  • 2
    Electronic Resource
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    Springer
    ISSN: 1432-1254
    Keywords: Weather ; Weather front ; Myocardial infarction ; Meteoropathology ; Biometerological methods
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract Some methodological aspects are discussed of the investigation of acute infarct myocarditis (AIM) in relation to weather fronts. Results of a new method of analysis are given. Data were analysed from about the hour of the onset of symptoms, and led to the diagnosis of AIM either immediately or within a few hours or days (3019 cases observed over 4.5 years during 1982–1986 in Plzen, Czechoslovakia). Weather classification was based on three factors (the type of the foregoing front, the type of the subsequent front, the time section of the time interval demarcated by the passage of the surfaces of the fronts). AIM occurrence increased in particular types of weather fronts: (i) by 30% during 7–12 h after a warm front, if the time span between fronts exceeded 24 h; (ii) by 10% in time at least 36 h distant from the foregoing cold or occlusion front and from the succeeding warm or occlusion front; (iii) by 20% during 0–2 h before the passage of the front, provided the foregoing front was not warm and the interval between fronts exceeded 5 h. AIM occurrence decreased by 15%–20% for time span between fronts 〉 24 h at times 6–11, 6–23 and 6–35 h before a coming warm or occlusion front (for interfrontal intervals 25–48, 49–72 and possibly 〉 72 h), and also at 12–23 and possibly 12–35 h before a cold front (for intervals 49–72 and possibly 〉 72 h), if the foregoing front was cold or an occlusion front.
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  • 3
    ISSN: 1432-1254
    Keywords: Hospital mortality ; Myocardial infarction ; Cardiovascular deaths ; Solar activity ; Geomagnetic activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract The dynamics of total hospital deaths from different kinds of cardiovascular diseases in one 1000-bed hospital were compared with 10 monthly cosmic/solar and geomagnetic physical activity parameters. Data used were of 180 consecutive months; 15601 deaths including 5667 from cardiovascular diseases were included in this study. It was concluded that the number of monthly hospital deaths shows a highly significant correlation with monthly solar physical activity.
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  • 4
    ISSN: 1432-1254
    Keywords: Key words Proton flux ; Ischemic heart disease ; Stroke ; Myocardial infarction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract  The influence of solar activity (SA) and geomagnetic activity (GMA) on human homeostasis has long been investigated. The aim of the present study was to analyse the relationship between monthly proton flux (〉90 MeV) and other SA and GMA parameters and between proton flux and temporal (monthly) distribution of total and cardiovascular-related deaths. The data from 180 months (1974–1989) of distribution in the Beilinson Campus of the Rabin Medical Centre, Israel, and of 108 months (1983–1991) from the Kaunas Medical Academy, were analysed and compared with SA, GMA and space proton flux (〉90 MeV). It was concluded: (1) monthly levels of SA, GMA and radiowave propagation (Fof2) are significantly and adversely correlated with monthly space proton flux (〉90 MeV); (2) medical-biological phenomena that increase during periods of low solar and/or geomagnetic activity may be stimulated by physical processes provoked by the concomitant increase in proton flux; (3) the monthly number of deaths related (positively or negatively) to SA are significantly and adversely related to the space proton flux (〉90 MeV).
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  • 5
    ISSN: 1432-1254
    Keywords: Cardiovascular deaths ; Myocardial infarction ; Temperature correlations ; Thermal neutrality ; Cold sensitivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract Analysis of 2-year myocardial infarct deaths in subtropical Brisbane shows an increase in mortality rate within a temperature range normally considered mild in mid-latitude locations. During both the coldest and warmest season, the relationship is a strong one, especially with temperatures that are below neutrality for the population.
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  • 6
    ISSN: 1432-1254
    Keywords: Myocardial infarction ; Suicide ; Solar activity ; Geomagnetic activity ; Serotonergic activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract In recent years, the possible association of changes in mortality from cardiovascular disease and myocardial infarction (MI) and deaths related to violence and the suicide rate has been repeatedly discussed. This study examined the relationship between cosmic physical changes (solar, geomagnetic and other space activity parameters) and changes in the total number of in-hospital and MI-related deaths and deaths from suicide to determine if a relationship exists between the distribution of total and MI-related deaths with suicide over time; some differences in the serotonergic mechanisms involved in the pathogenesis of MI and suicide were also taken into account. All suicides (n=2359) registered in the State of Israel from 1981 to 1989 (108 months) were analysed and compared with the total number of deaths (n=15601) and deaths from MI (n=1573) in a large university hospital over 180 months (1974–1989). The following were the main features of the Results. (1) Monthly suicide rate was correlated with space proton flux (r=0.42,P=0.0001) and with geomagnetic activity (r=−0.22,P=0.03). (2) Total hospital and MI-related deaths were correlated with solar activity parameters (r=0.35,P〈0.001) and radiowave propagation (r=0.52-0.44,P〈0.001), an with proton flux (r=−0.3 to −0.26,P〈0.01). (3) Monthly suicide distribution over 108 months was correlated with MI (r=−0.33,P=0.0005) and total hospital mortality (r=−0.22,P=0.024). (4) Gender differences were prominent. We conclude that the monthly distributions of suicides and deaths from MI are adversely related to many environmental physical parameters and negatively correlated with each other.
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  • 7
    ISSN: 1432-1254
    Keywords: Meteorological factors ; Temperature ; Atmospheric pressure ; Relative humidity ; Myocardial infarction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract Analysis of the time of onset of chest pain in 2254 patients with a myocardial infarction admitted to a coronary care unit in Leicester during a 10-year period shows an association with temperature and humidity. During both the most cold and humid times of the year, the relationship is a strong one. A generalized linear model with a log link was used to fit the data and the backward elimination selection procedure suggested a humid, cold day might help to trigger the occurrence of myocardial infarction. In addition, cold weather was found to have a stronger effect on the male population while those men aged between 50 and 70 years were more sensitive to the effect of high humidity.
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