[Postmortem studies of the cerebrovascular system by the vascular casting method and microangiography].

The author describes two methods used for postmortem examinations of the cerebral vascular system: vessel casting and microangiography. Both these methods make possible evaluation of small precapillary and capillary vessels - their course, lumen changes, density of the vessel network etc,. extending thus the possibility of morphological examinations of the vascular system in cerebrovascular diseases.

Microangiographic studies of denervated, reinnervated and hypertrophic muscles of rats.

The behavior of the capillaries of denervated, reinnervated and hypertrophic muscle of rats was investigated with aid of microangiography. The vessels of the denervated muscle ran irregular, formed spirals and their parallel position to the muscle fibers was completely lost. The appearance of vessels after 3 and 6 weeks in the reinnervated muscle was similar to that observed after denervation.

[Use of microangiography in postmortem angiographic examination of the brain].

By means of microangiography investigations of small blood vessels were carried out postmortem in cases of brain strokes. It was observed that a part of the precapillary and capillary vessels had irregular, tortuous course, formed "glomeruli" or intertwinning patterns. Histological examinations of the same sections done by means of conventional methods showed very intense changes in the vascular walls in the form of their striking fibrosis and hyalinization.

[Symptoms preceding rupture of subarachnoid aneurysms: an analysis].

In a group of 281 cases of subarachnoid haemorrhages including 105 cases of intracranial aneurysms confirmed on autopsy or by angiography the authors analyse the symptoms preceding subarachnoid haemorrhage and suggesting presence of aneurysm. The most frequent symptom suggesting presence of intracranial aneurysm were headaches, especially associated with other symptoms such as dizziness, nausea, paraesthesiae of extremities, visual disturbances. A careful analysis of these symptoms and early radiological examination may help in establishing the diagnosis of aneurysm before its rupture.

[Diagnostic difficulties in cases of expanding intracranial lesions where the anterior cerebral artery does not fill in arteriograms (2 cases)].

The author describes two cases of frontal-lobe brain tumours which expanded compressing the anterior cerebral artery and closing its lumen which simulated on arteriography intravascular obliteration of the vessel.