Abstract：
Five dogs and two cats with a diagnosis of double-chambered right ventricle or primary infundibular stenosis were referred to undergo a combined cutting balloon and high-pressure balloon technique. At admission five cases were asymptomatic, one had a history of syncope and one had signs of right-sided congestive heart failure. Each patient underwent a complete transthoracic echocardiogram, thoracic radiographs, an angiogram and the combined interventional procedure. Median diameter of the right mid-ventricular stenosis was 4 mm (range 2-8.7 mm) in dogs, and it measured 1.9 and 2 mm in cats. Under general anesthesia initial dilation with an 8-mm × 2-cm cutting balloon was performed from a left external jugular vein approach followed by dilation with a high-pressure balloon (1.5:1 balloon diameter-right outflow tract diameter ratio). In one dog and the two cats the procedure was not completed due to technical issues. In the other four dogs the median intracavitary proximal chamber pressure decreased from 100 mmHg (range 70-150 mmHg) before the procedure to 57 mmHg (range 45-70 mmHg) post-dilation. Long-term follow-up (from six months to two years) showed complete or partial reverse remodeling of the proximal chamber with a median residual pressure gradient below 80 mmHg (range 46-75 mmHg) for all four dogs. This case series shows that this procedure should be considered in dogs with right ventricular outflow tract obstruction. In cats, the procedure might be feasible, if additional guidewire inventory were available.
摘要：
诊断为双腔右心室或原发性漏斗狭窄的五只狗和两只猫被称为联合切割球囊和高压球囊技术。入院时5例无症状,一人有晕厥病史,一人有右侧充血性心力衰竭征象.每位患者都接受了完整的经胸超声心动图检查,胸片,血管造影和联合介入手术。犬右心室中段狭窄的中值直径为4mm（范围为2-8.7mm），在猫中测量到1.9和2毫米。在全身麻醉下，从左颈外静脉入路用8mm×2cm切割球囊进行初始扩张，然后用高压球囊扩张（球囊直径1.5：1-右流出道直径比）。在一只狗和两只猫中，由于技术问题，该程序未完成。在其他四只狗中，中位腔内近腔压力从手术前的100mmHg（范围70-150mmHg）降低到扩张后的57mmHg（范围45-70mmHg）。长期随访（从六个月到两年）显示，所有四只狗的近端室完全或部分逆向重塑，中位残余压力梯度低于80mmHg（范围46-75mmHg）。此病例系列表明，在右心室流出道阻塞的狗中应考虑此程序。在猫中，程序可能是可行的，如果有额外的导丝库存。
