Abstract
In experimental studies, permanent hypertension has been considered to be an important factor in aneurysm formation and growth. However, in clinical studies it has been found that saccular aneurysms often develop and rupture in some patients without persistent hypertension. Environmental events that temporarily and repeatedly increase blood pressure do not take an equivalent length of time in vivo but have been noted as factors in the growth or rupture of saccular aneurysms. In order to test the effect of intermittent blood pressure elevations on saccular aneurysm formation and growth, a reliable method for temporarily and repeatedly increasing blood pressure should be developed first and in this paper, such a model is described. It is based on the intraperitoneal injections of adrenaline in rats, a route which does not seem to have been used so far.
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