title: [Transvenous DSA of the extracranial cerebral arteries. Causes of reduced image quality based on a critical analysis of 1000 patients].
abstract: In this study images of 1000 patients examined via transvenous DSA were analysed and the image quality scrutinised for each vascular region while determining the causes of image quality reduction. The results show that the diagnostic image quality was 98% (excellent/good 79%, fair: 19%) for a. carotis communis, 94% (69 and 25%, respectively) for carotid bifurcation, 84% (54%, 30%) for distal int. carotid arteries, 91% (65%, 26%) for vertebral arteries and 74% (45%, 29%) for basilar artery. Reasons for image quality reduction were artifacts due to movements by the patients, and were also due to vascular superposition. Reduced left ventricular function resulting in prolonged circulation time and dilution of contrast material was frequently combined with an advanced age of the patients (greater than 75 years). Our studies suggest that transvenous DSA is not useful in patients with significantly reduced cardiac output who do not cooperate properly and are of advanced age. It may, therefore, be omitted to avoid unnecessary stress and high cost. In such cases intraarterial DSA or conventional angiography is indicated.
mesh_terms: D000368:Aged; D001488:Basilar Artery / Q000000981:diagnostic imaging; D002339:Carotid Arteries / Q000000981:diagnostic imaging; D002533:Cerebral Angiography / Q000379:methods*; D006801:Humans; D008875:Middle Aged; D012189:Retrospective Studies; D013382:Subtraction Technique; D014711:Vertebral Artery / Q000000981:diagnostic imaging
vernacular_title: Transvenöse DSA der extrakraniellen Hirnarterien. Ursachen einer reduzierten Bildqualität nach kritischer Analyse an 1000 Patienten.