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Cardiac

This is a Heart condition.

Long QT Syndrome

What is Long QT Syndrome?

A rare heart disease first characterized in the English Springer Spaniel, this can cause sudden collapse and seizures but is responsive to medical management. 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, leading to cardiac arrhythmias, leading to sudden collapse, seizures, and sometimes death. In the Springer Spaniel, LQTS has been mapped to a mutation in the KCNQ1 gene, and is responsive to medical management with drugs that slow the electrical pace of the heart.

What are the signs & symptoms that develop in affected dogs?

Signs include sudden collapse, seizures, and sometimes death

When do signs and symptoms develop?

First signs of this disease are often in adulthood.

How do vets diagnose this condition?

Genetic testing and ECG monitoring can be used to diagnose this disease.

How is this condition treated?

Fortunately, there are medications that can be given to affected dogs to help control the electrical pace of the heart.

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