Clinical prediction of large vessel occlusion in anterior circulation stroke: mission impossible?

Heldner, Mirjam Rachel; Hsieh, Kety Wha-Vei; Broeg-Morvay, Anne; Mordasini, Pasquale; Bühlmann, Monika; Jung, Simon; Arnold, Marcel; Mattle, Heinrich; Gralla, Jan; Fischer, Urs (2016). Clinical prediction of large vessel occlusion in anterior circulation stroke: mission impossible? Journal of neurology, 263(8), pp. 1633-1640. Springer-Medizin-Verlag 10.1007/s00415-016-8180-6

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Simple clinical scores to predict large vessel occlusion (LVO) in acute ischemic stroke would be helpful to triage patients in the prehospital phase. We assessed the ability of various combinations of National Institutes of Health Stroke Scale (NIHSS) subitems and published stroke scales (i.e., RACE scale, 3I-SS, sNIHSS-8, sNIHSS-5, sNIHSS-1, mNIHSS, a-NIHSS items profiles A-E, CPSS1, CPSS2, and CPSSS) to predict LVO on CT or MR arteriography in 1085 consecutive patients (39.4 % women, mean age 67.7 years) with anterior circulation strokes within 6 h of symptom onset. 657 patients (61 %) had an occlusion of the internal carotid artery or the M1/M2 segment of the middle cerebral artery. Best cut-off value of the total NIHSS score to predict LVO was 7 (PPV 84.2 %, sensitivity 81.0 %, specificity 76.6 %, NPV 72.4 %, ACC 79.3 %). Receiver operating characteristic curves of various combinations of NIHSS subitems and published scores were equally or less predictive to show LVO than the total NIHSS score. At intersection of sensitivity and specificity curves in all scores, at least 1/5 of patients with LVO were missed. Best odds ratios for LVO among NIHSS subitems were best gaze (9.6, 95 %-CI 6.765-13.632), visual fields (7.0, 95 %-CI 3.981-12.370), motor arms (7.6, 95 %-CI 5.589-10.204), and aphasia/neglect (7.1, 95 %-CI 5.352-9.492). There is a significant correlation between clinical scores based on the NIHSS score and LVO on arteriography. However, if clinically relevant thresholds are applied to the scores, a sizable number of LVOs are missed. Therefore, clinical scores cannot replace vessel imaging.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Radiology, Neuroradiology and Nuclear Medicine (DRNN) > Institute of Diagnostic and Interventional Neuroradiology
04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology

UniBE Contributor:

Heldner, Mirjam Rachel; Hsieh, Kety Wha-Vei; Broeg-Morvay, Anne; Mordasini, Pasquale; Bühlmann, Monika; Jung, Simon; Arnold, Marcel; Mattle, Heinrich; Gralla, Jan and Fischer, Urs

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0340-5354

Publisher:

Springer-Medizin-Verlag

Language:

English

Submitter:

Martin Zbinden

Date Deposited:

19 Jul 2016 09:41

Last Modified:

03 Aug 2016 01:31

Publisher DOI:

10.1007/s00415-016-8180-6

PubMed ID:

27272907

Uncontrolled Keywords:

Acute ischemic stroke; CT; Clinical neurological examination; MRI; Stroke management; Triage

BORIS DOI:

10.7892/boris.83717

URI:

https://boris.unibe.ch/id/eprint/83717

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