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Combined coronary lumen and vessel wall magnetic resonance imaging with i-T2prep: influence of nitroglycerin

  • Tarique HussainEmail author
  • Markus Henningsson
  • Britta Butzbach
  • Dirk Lossnitzer
  • Gerald F. Greil
  • Marcelo E. Andia
  • Rene M. Botnar
Original Paper

Abstract

It has been shown that sublingual nitroglycerin (NTG) improves image quality of coronary lumen magnetic resonance angiography. Our aim was to investigate the influence of NTG on coronary lumen and vessel wall image quality using a combined, single sequence approach (i-T2prep), which is able to image both within the known time frame of action of NTG. Ten healthy volunteers underwent right coronary artery lumen and vessel wall imaging using the i-T2prep sequence before and after administration of NTG. Image quality was assessed qualitatively and quantitatively. Diameter, length and wall thickness were also measured using dedicated semi-automatic software. NTG induced coronary vasodilatation (lumen diameter increased from 2.16 ± 0.32 to 2.52 ± 0.59 mm; p = 0.036). As a result, visualized lumen length (9.8 ± 2.6 to 11.4 ± 3.3 cm; p = 0.025) and qualitative lumen image quality (median 3 (interquartile range 2–3.25) vs. median 3 (interquartile range 3–4); p = 0.046) both improved. Vessel wall imaging also demonstrated a significant improvement in vessel wall sharpness after NTG (24.8 vs. 27.3 %; p = 0.036). This study demonstrates the benefits of NTG for coronary lumen and vessel wall imaging using a combined sequence, i-T2prep. The methodology described here has great potential for future pathophysiological studies.

Keywords

Nitroglycerin Coronary artery disease Magnetic resonance imaging 

Notes

Acknowledgments

The authors acknowledge financial support from the Department of Health via the National Institute for Health Research (NIHR) comprehensive Biomedical Research Centre award to Guy’s & St Thomas’ NHS Foundation Trust in partnership with King’s College London and King’s College Hospital NHS Foundation Trust. The MRI scanner is partly supported by Philips Healthcare.

Conflict of interest

None to declare.

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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • Tarique Hussain
    • 1
    Email author
  • Markus Henningsson
    • 1
  • Britta Butzbach
    • 1
  • Dirk Lossnitzer
    • 1
  • Gerald F. Greil
    • 1
  • Marcelo E. Andia
    • 1
    • 2
  • Rene M. Botnar
    • 1
    • 3
    • 4
    • 5
  1. 1.Division of Imaging Sciences and Biomedical Engineering, King’s College LondonSt Thomas’ HospitalLondonUK
  2. 2.Radiology Department, School of MedicinePontificia Universidad Catolica de ChileSantiagoChile
  3. 3.BHF Centre of ExcellenceKing’s College LondonLondonUK
  4. 4.Wellcome Trust and EPSRC Medical Engineering CenterKing’s College LondonLondonUK
  5. 5.NIHR Biomedical Research CentreKing’s College LondonLondonUK

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