Trait

Presyncope

Presyncope is a state of lightheadedness, muscular weakness, blurred vision, and feeling faint. Presyncope is most often cardiovascular in cause.

HPO HP:0031972

Body system: Abnormality of the cardiovascular system

This page as data

Add .json to the page's address, or ask for application/json, to read it as JSON.

library(jsonlite)

url <- "https://dantelabs.com/traits/presyncope.json"
page <- fromJSON(url)
page$trait$name

Open the JSON

Read the genes linked to Presyncope, and the rest of your genome, with one test.

From $449Free shipping · Results in 6–8 weeks

Get my Genome Test

5 genes linked to Presyncope

Changes in these genes cause rare conditions in which Presyncope is seen. Most people with this trait have none of those conditions, and a gene on this list says nothing about anyone's own genome.

Gene	How often it is seen	Conditions
KCND3potassium voltage-gated channel subfamily D member 3	Often (30–79%)	In 1 condition
PLCG2phospholipase C gamma 2	Often (30–79%)	In 1 condition
CDH2cadherin 2	Sometimes (5–29%)	In 1 condition
KCNJ2potassium inwardly rectifying channel subfamily J member 2	Sometimes (5–29%)	In 1 condition
TMEM43transmembrane protein 43	Not recorded	In 1 condition

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.

Broader traits

Abnormal cardiovascular system physiology

Where this comes from

The Human Phenotype Ontology, release 2026-09-01: the trait, its names, its definition and the genes linked to it. Find out more at hpo.jax.org.
Data release 2026.10.16-c6eea6bf.

One test. A lifetime of answers.