Rare diseases · Sign or symptom

Abnormal ventricular axis

HP:0033566

What it means

Any deviation from the normal direction of the ventricular axis. The left ventricle makes up most of the heart muscle under normal circumstances and therefore generates the most electrical force visible on the EKG. The normal ventricular axis is directed downward and slightly towards the left. The ventricular axis can be determined by analyzing the QRS complex, which represents ventricular depolarization.

The normal adult QRS axis is between -30 degrees and +90 degrees, which is directed downward and to the left.

Part of the broader category

Abnormal EKG

Also called: Abnormal QRS axis

Abnormal ventricular axis

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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.