COMPLEX INVESTIGATIONS OF ISCHEMIC CEREBRAL LESIONS
Cerebral vascular diseases are the most frequent reason for brain insult as an expression of brutal disturbance of cerebral circulation accompanied by severe insufficiency of the brain functions of general and local character. Cerebral in-farctions account for 55-70 per cent of cerebral insults according to different reports (5). During the last two decades their relative share sharply increases as compared with cerebral hemorrhages (3, 4, 6, 10). The introduction of a series of non-invasive
... of non-invasive modern methods such as electro-encephalography (EEG), rheoencephalography (REG), computer tomography (CT) etc. contributes to specifying of the early diagnosis, treatment and prophy-laxis of the hemodynamic cerebral abnormalities (1, 2, 7-9). The purpose of the present study is the analysis of the data from the complex clinical, electrophysiological and CT investigation of patients with ischemic brain lesion. Material and methods We investigated a total of 961 patients with an ischemic cerebral insult hospitalized in the Neurological Clinic of the Higher Institute of Medicine in Varna during the period from 1981 till 1985. We analysed the data from CT, EEG and REG studies. CT investigation was performed by using of the apparatus «Sire-tom-l»-Siemens with 10 mm thick sections. EEG examination was carried out by means of 8-channel electroencephalograph «RFT» and electrodes were assembled after the schedule 10/20. An approved visual EEG analysis was used. REG was performed by using a REG appliance switched to the electroencephalo-graph. Both fronto-mastoidal and occipito-mastoidal leads were used. Results and discussion During this period there were a total of 1386 cases with cerebro-vascular disease, of which 961 ones were clinical observations of an ischemic cerebro-vascular lesion. The structure of cerebral infarction according to years on the background of total morbidity of the cerebro-vascular disease as well as cerebral ischemia-cerebral hemorrhage ratio was demonstrated on table 1. The historical survey of various statistical reports during the recent two decades showed certain difference concerning both absolute rates and percentage ratios. According to our investigation, the relative share of cerebral infarction was between 61 and 76 per cent when cerebro-vascular disease was concerned, and, in contrast to cerebral hemorrhages, the infarctions rose in number. Age range of patients was between 18 and 84 years. When we analysed the incidence of the cerebral infarction in single age groups we noted that there was a priority of the 5 th and 6 th decades. However, during the last two years the relative part of the young age group increased.