A Patient With Severe Left Ventricular Dysfunction Undergoing Transcatheter Mitral Valve-In-Ring Using a Novel Renato Valve: A Case Report

Background: Mitral valve repair is a widely used operation to treat mitral regurgitation. However, the annuloplasty ring used may fail, causing mitral regurgitation to recur several years after the operation. Transcatheter mitral valve-in-ring (MViR) replacement may become a potential therapeutic strategy for those patients with high surgical risks. Case: This study presents a case report of a patient who underwent transcatheter MViR replacement using a novel Renato valve. A 67-year-old female presented with chest discomfort, and an echocardiogram showed severe mitral regurgitation and symptomatic left ventricular (LV) dysfunction. The patient had a surgical history of mitral repair, and the mitral regurgitation was due to the failed annuloplasty ring. As the patient was a poor candidate for the redo operation, we performed transcatheter MViR replacement using a novel Renato valve at our institution. The post-procedure transesophageal echocardiogram revealed a significant reduction in mitral regurgitation. The patient was discharged uneventfully, and the symptoms were alleviated. Conclusion: Transcatheter MViR replacement is a safe procedure for patients with a failed annuloplasty ring and LV dysfunction.