Rare diseases · Sign or symptom
Prolonged PR interval
HP:0012248
What it means
Increased time for the PR interval (beginning of the P wave to the beginning of the QRS complex).
In adults, normal values are 120 to 200 ms long.
Rare diseases that can present with this4
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: Electrocardiographic long PR interval · Lengthened PR interval on EKG
Tracking symptoms like this for someone? Eleplan keeps symptoms, diagnoses, medications and every specialist in one plan.
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.