realized in has material basis at all times has occurrent part impaired right branch of atrioventricular bundle right bundle branch block (process) heart conduction disease right bundle branch block (disease) disease_ontology Right bundle branch block with left posterior fascicular block (disorder) UMLS_CUI:C0155704 DOID:13209 SNOMEDCT_2010_1_31:46319007 ICD9CM:426.51 disease course