The Atrial Imaging with MRI in ASD (AIM-ASD) is an open-access cardiac magnetic resonance (CMR) dataset that provides high-resolution atrial imaging in adult patients with uncorrected secundum atrial septal defects (ASDs). This specific population is known to have high susceptibility to atrial remodelling and arrhythmogenesis, however detailed atrial imaging data for congenital heart disease cohorts remains scarce in existing public repositories.
The dataset includes CMR scans from 23 ASD patients and 17 comparison subjects with paroxysmal atrial fibrillation and structurally normal hearts. All imaging was performed using a standardized protocol on a 1.5T MRI scanner, incorporating contrast-enhanced whole-heart MR angiography and 3D late gadolinium enhancement (LGE) imaging for assessment of atrial anatomy and fibrotic substrate. Each scan is accompanied by expert manual bi-atrial segmentations provided in NifTi format and surface meshes containing fibrosis map in VTK format.
This dataset supports research into atrial structural remodelling, fibrosis distribution, and the arrhythmogenic substrate in congenital versus acquired atrial cardiomyopathy. It is also suitable for applications in computational modelling.
Data
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Contributors
- Magdalena Klis - King's College London, UK
Contact
Please email Magda.klis@kcl.ac.uk for further information about this dataset.