The electrocardiogram (E.C.G.) was recorded in 100 cases of meningeal hemorrhages. The most frequent abnormalies encountered were bradycardia (32%) and inversion of the T wave (34%). Rhythm and conduction problems were less frequently found. Bradycardia was frequently and T wave inversion rarely found in cases without disturbances of consciousness and those with favourable prognosis. The contrary was found in comatous patients and cases with lethal outcome. The existance of an aneurysm and the location of it did not influence the type of electrocardiographic abnormalies. The influence of the parasympathetic and especially the sympathetic nervous systems is emphasized.
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