Iodine-123 metaiodobenzylguanidine scintigraphy for the assessment of cardiac sympathetic innervation and the relationship with cardiac autonomic function in healthy adults using standardized methods

Omar Asghar, Parthiban Arumugam, Ian Armstrong, Simon Ray, Matthias Schmitt, Rayaz Malik

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Background Global iodine-123 metaiodobenzylguanidine (123I-MIBG) uptake is predictive of cardiovascular events and mortality in patients with heart failure. Normal variations in global and regional uptake, however, are not well defined and few studies have addressed the functional relevance of 123I-MIBG uptake and distribution in healthy individuals. Materials and methods We performed 123I-MIBG scintigraphy and cardiac autonomic function testing using the standardized methodology in 15 healthy individuals (mean age 54.6± 5.3 years, male : female 10 : 5) with no evidence of previous myocardial infarction or ischaemic heart disease. Results Early heart to mediastinum ratio (HMR) was 1.67± 0.13, late HMR was 1.73 ± 0.16 and washout rate was 19.09 ± 7.63% (4.20-31.30). Regional analysis showed reduced tracer uptake at the apex, base and inferior wall in all individuals. Early and late HMR correlated negatively with RFa (r=-0.603; P=0.05 and r=-0.644; P=0.033) and expiration and inspiration ratio (r=-0.616; P=0.043 and r=-0.676; P=0.022) and positively with LFa/RFa (r=0.711; P=0.014 and r=0.784; P=0.004). Washout rate correlated only with RFa (r=0.642; P=0.033). Conclusion Healthy adults show a heterogeneous pattern of cardiac innervation with reduced regional uptake of 123I-MIBG. Furthermore, HMR correlates with indices of cardiac sympathetic function, suggesting that it might not only be a useful prognostic marker but may also provide insight into the functional integrity of the cardiac autonomic nervous system.

Original languageEnglish
Pages (from-to)44-50
Number of pages7
JournalNuclear Medicine Communications
Volume38
Issue number1
DOIs
Publication statusPublished - 2017

Fingerprint

3-Iodobenzylguanidine
Mediastinum
Radionuclide Imaging
Iodine
Autonomic Nervous System
Myocardial Ischemia
Heart Failure
Myocardial Infarction
Mortality

Keywords

  • Cardiac autonomic neuropathy
  • Cardiac innervation
  • Iodine-123 metaiodobenzylguanidine
  • Scintigraphy

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

Iodine-123 metaiodobenzylguanidine scintigraphy for the assessment of cardiac sympathetic innervation and the relationship with cardiac autonomic function in healthy adults using standardized methods. / Asghar, Omar; Arumugam, Parthiban; Armstrong, Ian; Ray, Simon; Schmitt, Matthias; Malik, Rayaz.

In: Nuclear Medicine Communications, Vol. 38, No. 1, 2017, p. 44-50.

Research output: Contribution to journalArticle

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title = "Iodine-123 metaiodobenzylguanidine scintigraphy for the assessment of cardiac sympathetic innervation and the relationship with cardiac autonomic function in healthy adults using standardized methods",
abstract = "Background Global iodine-123 metaiodobenzylguanidine (123I-MIBG) uptake is predictive of cardiovascular events and mortality in patients with heart failure. Normal variations in global and regional uptake, however, are not well defined and few studies have addressed the functional relevance of 123I-MIBG uptake and distribution in healthy individuals. Materials and methods We performed 123I-MIBG scintigraphy and cardiac autonomic function testing using the standardized methodology in 15 healthy individuals (mean age 54.6± 5.3 years, male : female 10 : 5) with no evidence of previous myocardial infarction or ischaemic heart disease. Results Early heart to mediastinum ratio (HMR) was 1.67± 0.13, late HMR was 1.73 ± 0.16 and washout rate was 19.09 ± 7.63{\%} (4.20-31.30). Regional analysis showed reduced tracer uptake at the apex, base and inferior wall in all individuals. Early and late HMR correlated negatively with RFa (r=-0.603; P=0.05 and r=-0.644; P=0.033) and expiration and inspiration ratio (r=-0.616; P=0.043 and r=-0.676; P=0.022) and positively with LFa/RFa (r=0.711; P=0.014 and r=0.784; P=0.004). Washout rate correlated only with RFa (r=0.642; P=0.033). Conclusion Healthy adults show a heterogeneous pattern of cardiac innervation with reduced regional uptake of 123I-MIBG. Furthermore, HMR correlates with indices of cardiac sympathetic function, suggesting that it might not only be a useful prognostic marker but may also provide insight into the functional integrity of the cardiac autonomic nervous system.",
keywords = "Cardiac autonomic neuropathy, Cardiac innervation, Iodine-123 metaiodobenzylguanidine, Scintigraphy",
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T1 - Iodine-123 metaiodobenzylguanidine scintigraphy for the assessment of cardiac sympathetic innervation and the relationship with cardiac autonomic function in healthy adults using standardized methods

AU - Asghar, Omar

AU - Arumugam, Parthiban

AU - Armstrong, Ian

AU - Ray, Simon

AU - Schmitt, Matthias

AU - Malik, Rayaz

PY - 2017

Y1 - 2017

N2 - Background Global iodine-123 metaiodobenzylguanidine (123I-MIBG) uptake is predictive of cardiovascular events and mortality in patients with heart failure. Normal variations in global and regional uptake, however, are not well defined and few studies have addressed the functional relevance of 123I-MIBG uptake and distribution in healthy individuals. Materials and methods We performed 123I-MIBG scintigraphy and cardiac autonomic function testing using the standardized methodology in 15 healthy individuals (mean age 54.6± 5.3 years, male : female 10 : 5) with no evidence of previous myocardial infarction or ischaemic heart disease. Results Early heart to mediastinum ratio (HMR) was 1.67± 0.13, late HMR was 1.73 ± 0.16 and washout rate was 19.09 ± 7.63% (4.20-31.30). Regional analysis showed reduced tracer uptake at the apex, base and inferior wall in all individuals. Early and late HMR correlated negatively with RFa (r=-0.603; P=0.05 and r=-0.644; P=0.033) and expiration and inspiration ratio (r=-0.616; P=0.043 and r=-0.676; P=0.022) and positively with LFa/RFa (r=0.711; P=0.014 and r=0.784; P=0.004). Washout rate correlated only with RFa (r=0.642; P=0.033). Conclusion Healthy adults show a heterogeneous pattern of cardiac innervation with reduced regional uptake of 123I-MIBG. Furthermore, HMR correlates with indices of cardiac sympathetic function, suggesting that it might not only be a useful prognostic marker but may also provide insight into the functional integrity of the cardiac autonomic nervous system.

AB - Background Global iodine-123 metaiodobenzylguanidine (123I-MIBG) uptake is predictive of cardiovascular events and mortality in patients with heart failure. Normal variations in global and regional uptake, however, are not well defined and few studies have addressed the functional relevance of 123I-MIBG uptake and distribution in healthy individuals. Materials and methods We performed 123I-MIBG scintigraphy and cardiac autonomic function testing using the standardized methodology in 15 healthy individuals (mean age 54.6± 5.3 years, male : female 10 : 5) with no evidence of previous myocardial infarction or ischaemic heart disease. Results Early heart to mediastinum ratio (HMR) was 1.67± 0.13, late HMR was 1.73 ± 0.16 and washout rate was 19.09 ± 7.63% (4.20-31.30). Regional analysis showed reduced tracer uptake at the apex, base and inferior wall in all individuals. Early and late HMR correlated negatively with RFa (r=-0.603; P=0.05 and r=-0.644; P=0.033) and expiration and inspiration ratio (r=-0.616; P=0.043 and r=-0.676; P=0.022) and positively with LFa/RFa (r=0.711; P=0.014 and r=0.784; P=0.004). Washout rate correlated only with RFa (r=0.642; P=0.033). Conclusion Healthy adults show a heterogeneous pattern of cardiac innervation with reduced regional uptake of 123I-MIBG. Furthermore, HMR correlates with indices of cardiac sympathetic function, suggesting that it might not only be a useful prognostic marker but may also provide insight into the functional integrity of the cardiac autonomic nervous system.

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KW - Iodine-123 metaiodobenzylguanidine

KW - Scintigraphy

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