Hypertrophic Cardiomyopathy

Hypertrophic cardiomyopathy (HCM) is a heart disease in which the heart muscle thickens, reducing its ability to pump blood around the body. The condition is seen mainly in domestic cats.

It is the most common heart disease in cats (85% of cases). 1 in 10 British Shorthair cats suffers from HCM.

Many cats with hypertrophic cardiomyopathy show no clinical signs and appear healthy. In animals that have already developed heart failure the symptoms can include laboured and rapid breathing and lethargy.

Another potential risk is thromboembolism.

The diagnosis is made by performing echocardiography.

Treatment is aimed at controlling heart function and relieving pulmonary congestion.

The prognosis can vary. Cats without clinical signs can live trouble-free for years. Therapy significantly improves quality of life.