Dog Aortic Stenosis: Monitoring and Intervention

Aortic stenosis is a common congenital heart defect in large breed dogs that can cause sudden death or heart failure, requiring careful risk stratification and monitoring.

Key Facts

Subaortic stenosis is most common in Newfoundlands, Golden Retrievers, and Rottweilers
Obstruction to left ventricular outflow causes heart muscle thickening and reduced cardiac reserve
Severe cases carry significant risk of sudden cardiac death during exercise
Pressure gradient across the obstruction measured by echocardiography determines severity and management
Balloon valvuloplasty provides temporary improvement but does not change long-term prognosis in most cases

Welfare Considerations

Dogs with severe aortic stenosis live with a silent but serious risk of exercise-induced sudden death, which itself may be preceded by syncope and distress. Moderate cases experience exercise intolerance and fatigue. The emotional and practical burden on owners who must restrict beloved active breeds represents a welfare consideration for the human-animal bond. Regular cardiac monitoring allows appropriate activity restriction and early detection of progression, reducing preventable incidents and supporting quality of life within safe parameters.

What You Can Do

Have predisposed breeds evaluated by a cardiologist before purchase or breeding
Do not breed dogs with confirmed aortic stenosis, as the condition has a hereditary component
Restrict exercise appropriately based on severity classification from echocardiographic assessment
Schedule annual echocardiographic rechecks to monitor for progression
Discuss beta-blocker therapy with a cardiologist to reduce arrhythmia risk in severe cases