title: Multimodal 3 Tesla MRI confirms intact arterial wall in acute stroke patients after stent-retriever thrombectomy.
abstract: OBJECTIVE
  The aim of this prospective study was to assess vascular integrity after stent-retriever thrombectomy.
  
  
  METHODS
  Dissection, contrast medium extravasation, and vasospasm were evaluated in 23 patients after thrombectomy with biplane or 3D-digital subtraction angiography and 3-Tesla vessel wall MRI.
  
  
  RESULTS
  Vasospasm was detected angiographically in 10 patients, necessitating intra-arterial nimodipine in 2 of them. Contrast extravasation, intramural hemorrhage, or iatrogenic dissection were not detected on multimodal MRI in any patient even after Y-double stent-retriever technique.
  
  
  CONCLUSIONS
  Our findings suggest that clinically relevant vessel wall injuries occur rarely after stent-retriever thrombectomy.
authors.affiliation: From the Department of Diagnostic and Interventional Neuroradiology (K.H., R.K.V., G.S., P.P.G., F.K.-W., J.G., C.Z., P.M., M.E.-K.), and Department of Neurology (S.J., H.P.M.), University Hospital Bern, Switzerland. kety.hsieh@insel.ch.
authors.forename: Kety
authors.initials: K
authors.lastname: Hsieh
authors.affiliation: From the Department of Diagnostic and Interventional Neuroradiology (K.H., R.K.V., G.S., P.P.G., F.K.-W., J.G., C.Z., P.M., M.E.-K.), and Department of Neurology (S.J., H.P.M.), University Hospital Bern, Switzerland.
authors.forename: Rajeev K
authors.initials: RK
authors.lastname: Verma
authors.affiliation: From the Department of Diagnostic and Interventional Neuroradiology (K.H., R.K.V., G.S., P.P.G., F.K.-W., J.G., C.Z., P.M., M.E.-K.), and Department of Neurology (S.J., H.P.M.), University Hospital Bern, Switzerland.
authors.forename: Gerhard
authors.initials: G
authors.lastname: Schroth
authors.affiliation: From the Department of Diagnostic and Interventional Neuroradiology (K.H., R.K.V., G.S., P.P.G., F.K.-W., J.G., C.Z., P.M., M.E.-K.), and Department of Neurology (S.J., H.P.M.), University Hospital Bern, Switzerland.
authors.forename: Pascal P
authors.initials: PP
authors.lastname: Gratz
authors.affiliation: From the Department of Diagnostic and Interventional Neuroradiology (K.H., R.K.V., G.S., P.P.G., F.K.-W., J.G., C.Z., P.M., M.E.-K.), and Department of Neurology (S.J., H.P.M.), University Hospital Bern, Switzerland.
authors.forename: Frauke
authors.initials: F
authors.lastname: Kellner-Weldon
authors.affiliation: From the Department of Diagnostic and Interventional Neuroradiology (K.H., R.K.V., G.S., P.P.G., F.K.-W., J.G., C.Z., P.M., M.E.-K.), and Department of Neurology (S.J., H.P.M.), University Hospital Bern, Switzerland.
authors.forename: Jan
authors.initials: J
authors.lastname: Gralla
authors.affiliation: From the Department of Diagnostic and Interventional Neuroradiology (K.H., R.K.V., G.S., P.P.G., F.K.-W., J.G., C.Z., P.M., M.E.-K.), and Department of Neurology (S.J., H.P.M.), University Hospital Bern, Switzerland.
authors.forename: Christoph
authors.initials: C
authors.lastname: Zubler
authors.affiliation: From the Department of Diagnostic and Interventional Neuroradiology (K.H., R.K.V., G.S., P.P.G., F.K.-W., J.G., C.Z., P.M., M.E.-K.), and Department of Neurology (S.J., H.P.M.), University Hospital Bern, Switzerland.
authors.forename: Pasquale
authors.initials: P
authors.lastname: Mordasini
authors.affiliation: From the Department of Diagnostic and Interventional Neuroradiology (K.H., R.K.V., G.S., P.P.G., F.K.-W., J.G., C.Z., P.M., M.E.-K.), and Department of Neurology (S.J., H.P.M.), University Hospital Bern, Switzerland.
authors.forename: Simon
authors.initials: S
authors.lastname: Jung
authors.affiliation: From the Department of Diagnostic and Interventional Neuroradiology (K.H., R.K.V., G.S., P.P.G., F.K.-W., J.G., C.Z., P.M., M.E.-K.), and Department of Neurology (S.J., H.P.M.), University Hospital Bern, Switzerland.
authors.forename: Heinrich P
authors.initials: HP
authors.lastname: Mattle
authors.affiliation: From the Department of Diagnostic and Interventional Neuroradiology (K.H., R.K.V., G.S., P.P.G., F.K.-W., J.G., C.Z., P.M., M.E.-K.), and Department of Neurology (S.J., H.P.M.), University Hospital Bern, Switzerland.
authors.forename: Marwan
authors.initials: M
authors.lastname: El-Koussy
mesh_terms: D002533:Cerebral Angiography / Q000379:methods; D002536:Cerebral Arteries / Q000000981:diagnostic imaging*; D015331:Cohort Studies; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D011446:Prospective Studies; D015607:Stents / Q000009:adverse effects; D020521:Stroke / Q000000981:diagnostic imaging / Q000601:surgery*; D017131:Thrombectomy / Q000009:adverse effects / Q000379:methods*; D016896:Treatment Outcome; D020301:Vasospasm, Intracranial / Q000000981:diagnostic imaging / Q000209:etiology
keywords: magnetic resonance imaging; stroke; thrombectomy