Transventricular Valvuloplasty to Pulmonary Valve Stenosis in a Miniature-type Dog

Abstract

An efficient surgical procedure for pulmonary valve stenosis in a miniature-type dog is reported. Congenital pulmonary valve stenosis was diagnosed by echocadiography and cardiac catheterization in a six-month-old female Yorkshire Terrier weighing 1.8kg. Systolic pressure gradient measured 113mmHg across the pulmonic valve with cardiac catheterization. Judging from the small cavity of the pulmonary artery, severity of the stenosis, and evidence of concomitant tricuspid valve regurgitation, a modified Brock technique, a direct transventricular valvuloplasty, was performed. The dog underwent the surgery with no signs of serious complications. Four months after surgery, cardiac catheterization showed that the dog was clinically normal, and the systolic pressure gradient had dropped to 67mmHg. These results indicate that this modified Brock technique is useful as a transventricular valvuloplasty in treating for pulmonary valve stenosis in miniature-type dogs.