Monarch Disease Ontology identifier MONDO_0007240 (progressive familial heart block, type 1A) is an autosomal dominant inherited cardiac bundle branch disorder which can progress to complete heart block. Also known as: Lenegre's disease, PFHB1A, SCN5A progressive familial heart block, heart block, progressive, type IA, progressive familial heart block caused by mutation in SCN5A, progressive familial heart block, type IA.