Traits

Traits linked to CALM1

calmodulin 1

The Human Phenotype Ontology links 13 traits to CALM1, by body system: features seen in people with one of the gene's rare conditions.

Abnormality of the cardiovascular system

Trait	How often it is seen
Extra heart beat	Always
Fainting spell	Always
Heart stops beating	Always
Polymorphic ventricular tachycardia	Always
Prolonged QTc interval	Always
T-wave alternans	Always
Ventricular fibrillation	Always
2:1 atrioventricular block	Often (30–79%)
Sudden cardiac death	Sometimes (5–29%)
Ventricular tachycardia	Sometimes (5–29%)
Prolonged QT interval	Not recorded

Abnormality of the ear

Trait	How often it is seen
Dizziness	Not recorded

Constitutional symptom

Trait	How often it is seen
Sudden death	Not recorded

How often is among people with one of the gene's conditions, the most often across them, as the Human Phenotype Ontology records it. These pages describe traits and the research behind them; they are not a diagnosis, and a doctor or genetic counsellor is the person to ask about symptoms.

Where this comes from

The Human Phenotype Ontology, release 2026-09-01: the traits linked to CALM1 and how often each is seen. Find out more at hpo.jax.org.

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