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The mean heart weight as a measure of arterial hypertension of patients who died from spontaneous intracerebral hemorrhage (primary intracerebral hemorrhage or PIH) was compared with that of controls from the same autopsy population. All patients with valvular or congenital heart disease or disease processes associated with myocardial infiltration were excluded. In 206 cases of PIH, hypertension was diagnosed if heart weight greater than or equal to the mean heart weight of autopsy controls for either sex, plus 1.5 SD. Only 94 (46%) of all cases of PIH were hypertensive by this criterion. However, hypertension was five times more frequent in the cases than in the controls. The site of hemorrhage was clearly defined in 183 cases (88.8%) only. Of these, 80 (43.7%) had lobar hemorrhage and 69 (37.7%) bled in the basal ganglia. Only 26 cases (12.6%) had evidence of previous cerebral or myocardial infarction and there was no instance of previous intracerebral hemorrhage. These data show that arterial hypertension was present in about half the cases of PIH and suggest that other as yet unidentified risk factors for PIH may be more common than is realized. Patients who died from PIH had been healthy all their lives with no evidence of cardiovascular or cerebrovascular disease, and the PIH was their first evidence of disease.

Primary intracerebral hemorrhage and heart weight: a clinicopathologic case-control review of 218 patients.