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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Der Nervenarzt 70 (1999), S. 931-934 
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Präeklampsie ; Hirnödem ; Zerebraler Vasospasmus ; Farbkodierte Duplex-Sonographie ; Key words Preeclampsia ; Brain edema ; Cerebral vasospasm ; Color-coded duplex ultrasonography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The pathogenesis of cortical blindness as a rare complication in severe preeclampsia is still unclear. The case of a women with postpartum blindness is reported in which CT and MRI initially showed cortical and subcortical edema in the parieto-occipital lobes. At this time cerebral angiography and transcranial color-coded sonography (TCCS) revealed widespread cerebral vasospasm. Mean blood flow velocities in the middle and posterior cerebral artery and carotid syphon initially reached 380 cm/s and normalized within 2 weeks. While the patient's vision improved rapidly, follow-up MRI disclosed ischemic lesions and petechial hemorrhage in the occipital cortex. This case provides rare documentation that transient blindness in patients with preeclampsia may result from parieto-occipital ischemia due to cerebral vasospasm. In such patients TCCS may be useful to detect vasospasm associated with preeclampsia/eclampsia.
    Notes: Zusammenfassung Eine seltene Komplikation der Präeklampsie ist eine transiente kortikale Blindheit, deren Pathogenese noch unklar ist. Wir berichten über eine Patientin, die 3 Tage nach Entbindung erblindete. Die initiale CCT und MRT zeigte ein bilaterales parietookzipitaleÖdem. In der zerebralen Angiographie und transkraniellen farbkodierten Duplexsonographie wurde ein zerebraler Vasospasmus nachgewiesen. Die mittleren Strömungsgeschwindigkeiten in der A. cerebri media und posterior sowie im Karotissyphon beidseits waren initial auf Werte bis zu 380 cm/s erhöht und normalisierten sich innerhalb von 2 Wochen. Während sich die Sehstörung der Patientin rasch besserte, war in der MRT ein parietookziptaler Infarkt mit petechialen kortikalen Einblutungen nachzuweisen. Dieser Fallbericht zeigt, daß eine transiente Blindheit bei Patientinnen mit Präeklampsie durch eine parietookzipitale Ischämie bei zerebralem Vasospasmus verursacht werden kann. In solchen Fällen kann die transkranielle Duplexsonographie den Nachweis eines Vasospasmus ermöglichen und somit zur Klärung der Pathogenese von Sehstörungen bei Präeklampsie beitragen.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neurology 245 (1998), S. 106-110 
    ISSN: 1432-1459
    Keywords: Key words Agenesis of the corpus ; callosum ; Asymptomatic ; Magnetic ; resonance imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The pattern of anatomical features of the brain revealed by magnetic resonance imaging (MRI) is described in six patients incidentally identified as having acallosal brains. The complex of morphological features associated with complete agenesis of the corpus callosum included lateral displacement of slit-like anterior horns of the lateral ventricles (bullhorn-like shape), dilatation of the posterior horns of the lateral ventricles, absence of the septum pellucidum, lateral displacement of the cingulate gyri, complete separation of fornices and the presence of the anterior commissure and longitudinal callosal bundles (Probst’s bundles). No compensatory enlargement of the anterior commissure was seen in the patients. The planimetrically measured cross-sectional areas of the anterior commissures were between 2.0 and 4.2 mm2 (mean 3.1) (in ten normal subjects they were 4.5, SD 0.4; range 3.8–5.2 mm2) and were reduced in four and normal in two patients. Inconstant morphological features were an absence of the posterior commissure and a radial pattern of the sulci and gyri on the medial aspect of the hemispheres. Conventional clinical testing revealed no abnormalities except a slight impairment of walking heel-to-toe in two patients. None of the patients had subjective restrictions of activities of daily life, which shows the efficacy of unknown compensatory processes.
    Type of Medium: Electronic Resource
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