Individuals with impaired glucose tolerance demonstrate normal cardiac sympathetic innervation using I-123 mIBG scintigraphy

O. Asghar, P. Arumugam, I. S. Armstrong, S. G. Ray, M. Schmitt, Rayaz Malik

Research output: Contribution to journalArticle

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Abstract

Background: Impaired glucose tolerance (IGT) is associated with an increased risk of type 2 diabetes (T2DM) and cardiovascular disease. Some but not all studies have reported cardiac autonomic dysfunction in subjects with IGT and there is only one direct study of cardiac innervation in subjects with IGT. The purpose of this study was to assess global and regional cardiac sympathetic innervation and cardiac autonomic function in individuals with IGT. Methods and Results: We undertook 123I-mIBG scintigraphy and cardiac autonomic function in 15 subjects with IGT and 15 age and sex-matched healthy controls. Early heart to mediastinum ratio (HMR) (1.71 ± 0.17 vs 1.67 ± 0.13, P = .49), late HMR (1.73 ± 0.18 vs 1.73 ± 0.16, P = .97) and washout rate (WR) (18.6 ± 4.2 vs 19.1 ± 7.6%, P = .84), did not differ between subjects with IGT and control subjects. More detailed regional analysis revealed reduced tracer uptake at the apex, base and inferior wall in all subjects and the anterior wall in a minority of subjects. There were no differences in total score (56.6 ± 4.0 vs 53.3 ± 8.4, P = .193), modified score (48.5 ± 3.3 vs 46.2 ± 6.0, P = .215), anterior wall score (10.2 ± 1.3 vs 10.1 ± 1.6, P = .898), inferior wall score (8.9 ± 1.9 vs 7.7 ± 2.6, P = .163), basal score (18.7 ± 1.9 vs 18.2 ± 3.3, P = .636) and tests of cardiac autonomic function between the groups. Conclusion: Global and regional measures of MIBG uptake and washout as well as cardiac autonomic function did not differ between subjects with IGT and healthy controls.

Original languageEnglish
Pages (from-to)1262-1268
Number of pages7
JournalJournal of Nuclear Cardiology
Volume22
Issue number6
DOIs
Publication statusPublished - 1 Dec 2015

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Glucose Intolerance
Radionuclide Imaging
Mediastinum
Heart Function Tests
3-Iodobenzylguanidine
Type 2 Diabetes Mellitus
Cardiovascular Diseases

Keywords

  • diabetes
  • MIBG imaging
  • SPECT

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine

Cite this

Individuals with impaired glucose tolerance demonstrate normal cardiac sympathetic innervation using I-123 mIBG scintigraphy. / Asghar, O.; Arumugam, P.; Armstrong, I. S.; Ray, S. G.; Schmitt, M.; Malik, Rayaz.

In: Journal of Nuclear Cardiology, Vol. 22, No. 6, 01.12.2015, p. 1262-1268.

Research output: Contribution to journalArticle

Asghar, O. ; Arumugam, P. ; Armstrong, I. S. ; Ray, S. G. ; Schmitt, M. ; Malik, Rayaz. / Individuals with impaired glucose tolerance demonstrate normal cardiac sympathetic innervation using I-123 mIBG scintigraphy. In: Journal of Nuclear Cardiology. 2015 ; Vol. 22, No. 6. pp. 1262-1268.
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AU - Schmitt, M.

AU - Malik, Rayaz

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