Congenital cardiac disease in dogs

Area of Science:

• Veterinary Cardiology
• Canine Congenital Heart Disease

Background:

• Ventricular septal defects (VSD) are a common congenital heart anomaly in dogs.
• VSDs typically occur in the high membranous septum, with English Bulldogs and Siberian Huskies potentially predisposed.
• Clinical presentation varies with defect size, ranging from asymptomatic to severe signs like pulmonary congestion and cyanosis.

Purpose of the Study:

• To describe the typical presentation, diagnostic methods, and treatment options for ventricular septal defects in dogs.
• To highlight the diagnostic utility of selective angiocardiography for VSD in canine patients.

Main Methods:

• Review of clinical signs, diagnostic imaging (ECG, radiography, echocardiography), and angiocardiography in dogs with VSD.
• Discussion of surgical interventions, including prosthetic septal patching and pulmonary artery banding.

Main Results:

• VSDs are characterized by specific heart murmurs and potential right-sided heart enlargement on ECG and radiographs.
• Nonselective angiocardiography is often inconclusive for diagnosing VSD with left-to-right shunting.
• Selective angiocardiography directly into the left ventricle is the preferred diagnostic method.

Conclusions:

• Small VSDs may not cause symptoms, while large defects require intervention.
• Surgical correction is necessary for symptomatic dogs with large VSDs.
• Accurate diagnosis through selective angiocardiography is crucial for effective management of canine VSD.