European Radiology

, Volume 25, Issue 11, pp 3161–3166

Hyperintense acute reperfusion marker is associated with higher contrast agent dosage in acute ischaemic stroke

  • Ann-Christin Ostwaldt
  • Michal Rozanski
  • Tabea Schaefer
  • Martin Ebinger
  • Gerhard J. Jungehülsing
  • Kersten Villringer
  • Jochen B. Fiebach
Magnetic Resonance

DOI: 10.1007/s00330-015-3749-5

Cite this article as:
Ostwaldt, AC., Rozanski, M., Schaefer, T. et al. Eur Radiol (2015) 25: 3161. doi:10.1007/s00330-015-3749-5

Abstract

Objective

The hyperintense acute reperfusion marker (HARM) on fluid-attenuated inversion recovery (FLAIR) images is associated with blood-brain barrier (BBB) permeability changes. The aim of this study was to examine the influence of contrast agent dosage on HARM incidence in acute ischaemic stroke patients.

Methods

We prospectively included 529 acute ischaemic stroke patients (204 females, median age 71 years). Patients underwent a first stroke-MRI within 24 hours from symptom onset and had a follow-up on day 2. The contrast agent Gadobutrol was administered to the patients for perfusion imaging or MR angiography. The total dosage was calculated as ml/kg body weight and ranged between 0.04 and 0.31 mmol/kg on the first examination. The incidence of HARM was evaluated on day 2 FLAIR images.

Results

HARM was detected in 97 patients (18.3 %). HARM incidence increased significantly with increasing dosages of Gadobutrol. Also, HARM positive patients were significantly older. HARM was not an independent predictor of worse clinical outcome, and we did not find an association with increase risk of haemorrhagic transformation.

Conclusions

A higher dosage of Gadobutrol in acute stroke patients on initial MRI is associated with increased HARM incidence on follow-up. MRI studies on BBB should therefore standardize contrast agent dosages.

Key Points

• Hyperintense acute reperfusion marker on MRI indicates blood-brain barrier disruption.

• This observational study on stroke patients characterizes HARM.

• Incidence depends on contrast agent dosage on the previous day.

• HARM is also associated with older age and poor kidney function.

• Interpretation of HARM must take dosage into consideration.

Keywords

Magnetic Resonance Imaging Acute stroke Blood-Brain Barrier Gadolinium Dosage 

Abbreviations

HARM

Hyperintense acute reperfusion marker

FLAIR

Fluid-attenuated inversion recovery

CSF

Cerebrospinal fluid

BBB

Blood-brain barrier

DWI

Diffusion-weighted imaging

PI

Perfusion imaging

HT

Haemorrhagic transformation

PH

Parenchymal haemorrhage

NIHSS

National Institutes of Health Stroke Scale

mRS

Modified Rankin Scale

GFR

Glomerular filtration rate

Copyright information

© European Society of Radiology 2015

Authors and Affiliations

  • Ann-Christin Ostwaldt
    • 1
  • Michal Rozanski
    • 1
    • 2
  • Tabea Schaefer
    • 1
  • Martin Ebinger
    • 1
    • 2
  • Gerhard J. Jungehülsing
    • 3
  • Kersten Villringer
    • 1
  • Jochen B. Fiebach
    • 1
  1. 1.Academic Neuroradiology, Center for Stroke Research Berlin (CSB)Charité Universitätsmedizin BerlinBerlinGermany
  2. 2.Department of NeurologyCharité UniversitätsmedizinBerlinGermany
  3. 3.Jüdisches Krankenhaus BerlinStiftung des Bürgerlichen RechtsBerlinGermany

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