Die Abhängigkeit der arteriellen und venösen retinalen Gefäßverschlüsse von der Jahreszeit und dem Wetter
type: CreativeWork
description: In this study the seasonal and meteorological influence on the incidence of 173 retinal arterial and 275 retinal vein occlusions was examined retrospectively over a five-year period. In the first part of this study the incidence of the retinal vein occlusion showed a significant cyclic variation, being most frequent in the months of October and November and rarest in February. The four-seasonal variation with a minimum in summer and a maximum in autumn was also significant. The incidence of the retinal arterial occlusions showed no monthly cyclic variation, but distribution to the four seasons showed a significant minimum in spring and a significant maximum in winter. The significant cyclic variations in the onset of retinal occlusions suggest that exogenous seasonal factors may be important in the pathogenesis in addition to the well-known association with endogenous diseases. Seasonal variations are surely not the cause of retinal occlusions but may be the seasonal influence acts as a trigger on patients with risk factors. The organism shows through the means and the power of reactions its ability of adaptation and its capabilities ; i.e. where its “locus minoris resistentiae” is. The winter peak of retinal arterial occlusions and the accumulation of retinal vein occlusions in the winter indicate the influence of temperature. Coldness stimulus causes changes of rheological parameters and influences blood pressure and blood flow as well as the sympathicus tonus. These changes can have negative effects on risk patients. But the coldness stimulus does not explain the early peak of retinal vein occlusions in autumn. There must be an influence of other seasonal factors. In general the adaptation to the change of weather or other seasonal factors may be a burden for risk patients with low adaptability. These changes act as a stressor. Stress leads to an increase of the sympathicus tonus and therefore to changes in rheological parameters, blood pressure and blood flow. I…
abstract: In this study the seasonal and meteorological influence on the incidence of 173 retinal arterial and 275 retinal vein occlusions was examined retrospectively over a five-year period. In the first part of this study the incidence of the retinal vein occlusion showed a significant cyclic variation, being most frequent in the months of October and November and rarest in February. The four-seasonal variation with a minimum in summer and a maximum in autumn was also significant. The incidence of the retinal arterial occlusions showed no monthly cyclic variation, but distribution to the four seasons showed a significant minimum in spring and a significant maximum in winter. The significant cyclic variations in the onset of retinal occlusions suggest that exogenous seasonal factors may be important in the pathogenesis in addition to the well-known association with endogenous diseases. Seasonal variations are surely not the cause of retinal occlusions but may be the seasonal influence acts as a trigger on patients with risk factors. The organism shows through the means and the power of reactions its ability of adaptation and its capabilities ; i.e. where its “locus minoris resistentiae” is. The winter peak of retinal arterial occlusions and the accumulation of retinal vein occlusions in the winter indicate the influence of temperature. Coldness stimulus causes changes of rheological parameters and influences blood pressure and blood flow as well as the sympathicus tonus. These changes can have negative effects on risk patients. But the coldness stimulus does not explain the early peak of retinal vein occlusions in autumn. There must be an influence of other seasonal factors. In general the adaptation to the change of weather or other seasonal factors may be a burden for risk patients with low adaptability. These changes act as a stressor. Stress leads to an increase of the sympathicus tonus and therefore to changes in rheological parameters, blood pressure and blood flow. I…
author: Vogelheim, Silke
language: ger
keywords: info:eu-repo/classification/ddc/610, Medizin
date published: 2002
date modified: 2026-07-30T19:42:09Z
provider: RWTH Aachen University
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Publikationsserver der RWTH Aachen University