PT  - JOURNAL ARTICLE
AU  - C Streibel
AU  - C C Willers
AU  - O Pusterla
AU  - G Bauman
AU  - O Bieri
AU  - E Stranzinger
AU  - B Brabandt
AU  - P Latzin
AU  - E Kieninger
TI  - Effect of ELX/TEZ/IVA treatment on lung ventilation in children with cystic fibrosis – comprehensive assessment using spirometry, MBW, structural and functional lung MRI
AID  - 10.1183/13993003.congress-2022.3919
DP  - 2022 Sep 04
TA  - European Respiratory Journal
PG  - 3919
VI  - 60
IP  - suppl 66
4099  - http://erj.ersjournals.com/content/60/suppl_66/3919.short
4100  - http://erj.ersjournals.com/content/60/suppl_66/3919.full
SO  - Eur Respir J2022 Sep 04; 60
AB  - Background: With the introduction of cystic fibrosis transmembrane conductance regulator (CFTR)-modulator treatment in patients with cystic fibrosis (CF) a new era of milder lung disease started. Thus, sensitive parameters are needed to comprehensively monitor disease course. Functional lung matrix-pencil decomposition (MP)-MRI is a promising tool that allows calculating quantitative impairment of ventilation and perfusion.Aim: To assess applicability of structural and functional MRI to monitor treatment effects in patients with CF after starting ELX/TEZ/IVA treatment.Methods: 23 children with CF underwent lung function tests (spirometry, multiple breath washout), structural and functional (matrix pencil, MP) MRI before and after starting ELX/TEZ/IVA treatment (mean (range) treatment 4.6 (0.5 to 10.2) months). Main outcomes were changes in FEV1, lung clearance index (LCI), Eichinger score and defect percentage of ventilation (VDP) and perfusion (QDP).Results: We observed a significant improvement in lung function and structural and functional MRI parameters upon ELX/TEZ/IVA treatment (mean; 95%-CI from paired t-test): delta FEV1 1.13 (0.63 to 1.62) z-Scores, p<0.001; delta LCI -0.94 (-1.75 to -0.14), p=0.024; delta VDP [% of impairment] -5.87 (-8.43 to -3.32), p<0.001; delta QDP [% of impairment] -4.08 (-6.15 to -2.02), p<0.001; delta Eichinger score -3.90 (-5.15 to -2.65), p<0.001.Conclusion: Both structural and functional MRI are suitable tools to monitor treatment effects of ELX/TEZ/IVA therapy in patients with CF.FootnotesCite this article as Eur Respir J 2022; 60: Suppl. 66, 3919.This article was presented at the 2022 ERS International Congress, in session “-”.This is an ERS International Congress abstract. No full-text version is available. Further material to accompany this abstract may be available at www.ers-education.org (ERS member access only).