Hybrid solid-state SPECT/CT left atrial innervation imaging for identification of left atrial ganglionated plexi: Technique and validation in patients with atrial fibrillation
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
BACKGROUND: Ablating left atrial (LA) ganglionated plexi (GP), identified invasively by high-frequency stimulation (HFS) during pulmonary vein isolation (PVI), may reduce atrial fibrillation (AF) recurrence. 123I-metaiodobenzylguanidine (123I-mIBG) solid-state SPECT LA innervation imaging (LAII) has the spatial resolution to detect LAGP non-invasively but this has never been demonstrated in clinical practice. METHODS: 20 prospective patients with paroxysmal AF scheduled for PVI underwent 123I-mIBG LAII. High-resolution tomograms, reconstructed where possible using cardiorespiratory gating, were co-registered with pre-PVI cardiac CT. Location and reader confidence (1 [low] to 3 [high]) in discrete 123I-mIBG LA uptake areas (DUAs) were recorded and correlated with HFS. RESULTS: A total of 73 DUAs were identified, of which 59 (81%) were HFS positive (HFS +). HFS + likelihood increased with reader confidence (92% [score 3]). 64% of HFS-negative DUAs occurred over the lateral and inferior LA. Cardiorespiratory gating reduced the number of DUAs per patient (4 vs 7, P = .001) but improved: HFS + predictive value (76% vs 49%); reader confidence (2 vs 1, P = .02); and inter-observer, intra-observer, and inter-study agreement (κ = 0.84 vs 0.68; 0.82 vs 0.74; 0.64 vs 0.53 respectively). CONCLUSIONS: 123I-mIBG SPECT/CT LAII accurately and reproducibly identifies GPs verified by HFS, particularly when reconstructed with cardiorespiratory gating.
Date Issued
2020-12-01
Date Acceptance
2018-09-19
Citation
Journal of Nuclear Cardiology, 2020, 27, pp.1939-1950
ISSN
1071-3581
Publisher
Springer Verlag
Start Page
1939
End Page
1950
Journal / Book Title
Journal of Nuclear Cardiology
Volume
27
Copyright Statement
© American Society of Nuclear Cardiology 2019. The final publication is available at Springer via https://link.springer.com/article/10.1007%2Fs12350-018-01535-5
Identifier
https://www.ncbi.nlm.nih.gov/pubmed/30694425
PII: 10.1007/s12350-018-01535-5
Subjects
Nuclear medicine
atrial fibrillation
catheter ablation
ganglionated plexi
imaging
mIBG, SPECT/CT, CZT
mapping
nervous system, autonomic
Publication Status
Published
Coverage Spatial
United States
Date Publish Online
2019-01-29