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Patent Ductus Arteriosus in Dogs: Cardiac Welfare

Patent ductus arteriosus is a congenital heart defect common in certain dog breeds. This guide covers welfare implications, diagnosis, and treatment.

Key Facts

PDA occurs when the fetal blood vessel connecting aorta and pulmonary artery fails to close
Without treatment, most dogs develop congestive heart failure within 1-2 years
A continuous 'machinery murmur' is characteristic on auscultation
Minimally invasive catheter-based closure is now the preferred treatment
Surgical ligation is an alternative for dogs unsuitable for catheter closure
Prognosis is excellent with early treatment before heart changes develop

Welfare Considerations and Management

Welfare-centred management of PDA requires early diagnosis and prompt referral to a cardiologist. Before closure, affected dogs may show exercise intolerance and laboured breathing. Catheter-based coil or device closure corrects the defect with minimal recovery time. Surgical ligation is effective but more invasive. Dogs treated early before cardiac remodelling typically have normal life expectancy.

What You Can Do

Have puppies examined for heart murmurs as part of routine checks
Seek specialist cardiology assessment if PDA is suspected
Proceed with closure as soon as feasible to prevent cardiac changes
Most treated dogs need no long-term cardiac medication