Zentralblatt für Chirurgie
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Comparative Study
[MR-angiography and duplex-ultrasonography: predictive reliability for angiographically determined internal carotid artery stenosis >/= 70-99%].
A prospective study was undertaken to evaluate whether digital subtraction angiography (DSA) which is still associated with a substantial morbidity can be replaced by less invasive diagnostic modalities such as duplex scanning (DS) and magnetic resonance angiography (MR-A) for the detection of angiographically defined internal carotid artery (ICA) stenosis >/= 70 %. ⋯ In our series, both duplex-derived PSV as well as MR-A provided high sensitivity to detect surgically relevant ICA stenosis. However, to select patients for surgery inclusion of EDV proved to be important due to a high PPV and may spare conventional angiography half of patients with stenosis exceeding 70 %.