Congenital Pulmonic Stenosis a Retrospective study of 24 cases seen between 1990-1999

Area of Science:

• Veterinary Cardiology
• Interventional Cardiology

Background:

• Pulmonic stenosis is a common congenital heart defect in dogs.
• Pulmonary balloon valvuloplasty (PBV) is a treatment for pulmonic stenosis, but its long-term efficacy in dogs requires evaluation.

Purpose of the Study:

• To assess the long-term effects of PBV in dogs with congenital pulmonic stenosis.
• Evaluate clinical signs, echocardiographic parameters, and survival times post-PBV.

Main Methods:

• Diagnosed pulmonic stenosis in 24 dogs (1990-1999).
• Treated 18 dogs with PBV; 6 served as an untreated control group.
• Monitored clinical signs, echocardiography, and survival for up to nine years.

Main Results:

• Twelve PBV-treated dogs were alive and asymptomatic at follow-up (6 months to 9 years).
• Mean Doppler pressure gradient decreased from 98 mmHg pre-PBV to 65 mmHg (24 hours) and 64 mmHg (long-term).
• Three PBV-treated dogs (17%) experienced restenosis; four of six untreated dogs survived 2-4.5 years.

Conclusions:

• PBV significantly reduced clinical signs and improved quality of life in symptomatic dogs.
• No significant difference in survival time was observed between PBV-treated and untreated groups at this follow-up stage.