Rare diseases · Sign or symptom

Abnormal heart sound

HP:0031657

What it means

Any abnormal noise generated by the beating heart.

The first two heart sounds, S1 and S2, define ventricular systole. S1 comprises the closure of the mitral and tricuspid valves. S2 is produced by aortic and pulmonic valve closure.

Part of the broader category

Abnormal heart sound

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This 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.