Extravasation of contrast medium from cerebral aneurysmal rupture during angiography (remarks on four cases)

The authors report four cases of contrast material extravasation during carotid angiography from cerebral aneurysmal rupture. The thesis of a coincidental event not due to an increase in the intraarterial pressure, is supported. The poor prognosis of these bleedings, detectable on angiography, is underlined and the questionable toxic effect of contrast material in the subarachnoidal space is discussed.