Long QT Syndrome
The QT interval reflects how the heart’s ventricles — or main pumping chambers — contract, recover, and prepare for the next beat. This condition prolongs this interval, which means the ventricles may fall out of rhythm with the rest of the heart.
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Signs and symptoms
Signs include sudden collapse, seizures, and sometimes death
First signs of this disease are often in adulthood.Uncover health risks with Embark
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Diagnosis
Genetic testing and ECG monitoring can be used to diagnose this disease.
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Treatment
Fortunately, there are medications that can be given to affected dogs to help control the electrical pace of the heart.
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What to do if your dog is at risk
Actions
- Talk to your vet about your dog’s Long QT syndrome result so you can plan regular monitoring and care.
- Schedule routine cardiac screenings, such as ECGs or echocardiograms, to track heart rhythm and function over time.
- Avoid overly strenuous exercise or excitement, as these can sometimes trigger fainting episodes.
- With ongoing monitoring and a calm, consistent routine, many dogs with Long QT syndrome can live comfortably.
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Genetic Information
In the English Springer Spaniel, LQTS has been mapped to a mutation in the KCNQ1 gene.
All affected dogs were heterozygous (had only one copy) of the mutation.
Gene names:
KCNQ1 ‐ chr
Inheritance type:
dominant
Citations:
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Breeds affected
This health condition affects the following breeds
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