Rare diseases · Sign or symptom
Complete right bundle branch block
HP:0011712
What it means
A conduction block of the right branch of the bundle of His. This manifests as a prolongation of the QRS complex (greater than 0.12 s) with delayed activation of the right ventricle and terminal delay on the EKG.
Rare diseases that can present with this20
Common30–79%
7Sometimes5–29%
12- Aortic arch interruption
- Atrial septal defect, sinus venosus type
- Chronic thromboembolic pulmonary hypertension
- Complete atrioventricular septal defect
- Dysferlin-related limb-girdle muscular dystrophy R2
- Eisenmenger syndrome
- Histiocytoid cardiomyopathy
- Interatrial communication
and 4 more in this range
The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.
Part of the broader category
Also called: Right bundle branch block · Right bundle-branch block
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Start free with EleplanThis page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.