Evaluation of the Genetic Basis of Familial Aggregation of Pacemaker Implantation by a Large Next Generation Sequencing Panel
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Background: The etiology of conduction disturbances necessitating permanent pacemaker (PPM) implantation is often unknown, although familial aggregation of PPM (faPPM) suggests a possible genetic basis. We developed a pan-cardiovascular next generation sequencing (NGS) panel to genetically characterize a selected cohort of faPPM.
Materials And Methods: We designed and validated a custom NGS panel targeting the coding and splicing regions of 246 genes with involvement in cardiac pathogenicity. We enrolled 112 PPM patients and selected nine (8%) with faPPM to be analyzed by NGS.
Results: Our NGS panel covers 95% of the intended target with an average of 229x read depth at a minimum of 15-fold depth, reaching a SNP true positive rate of 98%. The faPPM patients presented with isolated cardiac conduction disease (ICCD) or sick sinus syndrome (SSS) without overt structural heart disease or identifiable secondary etiology. Three patients (33.3%) had heterozygous deleterious variants previously reported in autosomal dominant cardiac diseases including CCD: LDB3 (p.D117N) and TRPM4 (p.G844D) variants in patient 4; TRPM4 (p.G844D) and ABCC9 (p.V734I) variants in patient 6; and SCN5A (p.T220I) and APOB (p.R3527Q) variants in patient 7.
Conclusion: FaPPM occurred in 8% of our PPM clinic population. The employment of massive parallel sequencing for a large selected panel of cardiovascular genes identified a high percentage (33.3%) of the faPPM patients with deleterious variants previously reported in autosomal dominant cardiac diseases, suggesting that genetic variants may play a role in faPPM.
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Weng L, Ramo J, Jurgens S, Khurshid S, Chaffin M, Hall A Nat Genet. 2025; 57(1):53-64.
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Palladino A, Papa A, Petillo R, Scutifero M, Morra S, Passamano L Genes (Basel). 2022; 13(2).
PMID: 35205305 PMC: 8871839. DOI: 10.3390/genes13020258.
Cheng L, Li X, Zhao L, Wang Z, Zhang J, Liang Z Int J Genomics. 2020; 2020:2415850.
PMID: 32211440 PMC: 7061116. DOI: 10.1155/2020/2415850.
Hayashi K, Teramoto R, Nomura A, Asano Y, Beerens M, Kurata Y Cardiovasc Res. 2020; 116(13):2116-2130.
PMID: 31977013 PMC: 8453299. DOI: 10.1093/cvr/cvaa010.
Genetic Discovery of ATP-Sensitive K Channels in Cardiovascular Diseases.
Huang Y, Hu D, Huang C, Nichols C Circ Arrhythm Electrophysiol. 2019; 12(5):e007322.
PMID: 31030551 PMC: 6494091. DOI: 10.1161/CIRCEP.119.007322.