Long QT Syndrome
The "QT" in "long QT" stands for the interval in an echocardiograph (or ECG) that represents the ventricles of the heart completing their contraction (the "lub" in the "lub dub" of the heartbeat), recovering, and preparing for the next contraction. An abnormally long QT means the ventricles may end up out of sync 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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