Successful balloon angioplasty of right pulmonary coarctation with left pulmonary artery interruption in a cat: a long-term outcome follow-up case report

• Published in: Journal of Veterinary Medical Science p. 24-0501
• Main Authors: JEON, Sunghoon, LEE, Gahyun, HAN, Dahee, KIM, Jin-Kyung, LEE, Namsoon, CHANG, Dongwoo
• Format: Journal Article
• Language: English
• Published: Japan JAPANESE SOCIETY OF VETERINARY SCIENCE 29.07.2025
• Subjects: peripheral pulmonary artery stenosis; pulmonary artery interruption; pulmonary coarctation; unilateral absence of pulmonary artery; unilateral absence of pulmonary artery; pulmonary artery interruption; peripheral pulmonary artery stenosis; pulmonary coarctation
• ISSN: 0916-7250; 1347-7439; 1347-7439
• DOI: 10.1292/jvms.24-0501

A 4-month-old, British Shorthair kitten was referred to our institute for evaluation of a heart murmur. Thoracic radiography and echocardiography revealed narrowing of the right pulmonary artery, accompanied by right atrial dilation and right ventricular hypertrophy. The systolic flow velocity across the stenotic lesion was 6.15 m/sec, with a pressure gradient of 151.42 mmHg. Computed tomography confirmed right pulmonary coarctation with concurrent interruption of the left pulmonary artery. Balloon angioplasty was performed, reducing the systolic flow velocity from 6.15 m/sec to 2.79 m/sec and relieving right ventricular pressure overload. One year later, thoracic radiography revealed left lung collapse and right lung hyperinflation; however, the patient remained asymptomatic. At 33 months post-diagnosis, the patient continued to thrive without any clinical signs.