Rare diseases · Sign or symptom
Mildly reduced left ventricular ejection fraction
HP:0012663
What it means
A small reduction in the fraction of blood pumped from the left ventricle with each cardiac cycle. The normal range in adults is at least 50 percent, and a mild reduction is defined as 40-49 percent.
Rare diseases that can present with this2
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: Mildly reduced ejection fraction
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.