Thrombotic valvular dysfunction with transcatheter mitral interventions for postsurgical failures.

BACKGROUND: Degenerated surgical mitral valve repairs or surgical prostheses are currently being treated with transcatheter mitral valve replacement (TMVR). We report the procedural and mid-term assessment of thirteen cases.

METHODS: From 12/2013 to 12/2015, 13 consecutive patients with degenerated mitral valve repair or valve replacement were treated. Patients were assessed for mitral valve academic valve consortium (MVARC) defined outcomes.

RESULTS: Immediate procedural MVARC defined technical success was 92%. At 30 days MVARC device and procedure success were 61% and 84%, respectively. Mean follow-up was 150 days [IQR 40-123 days]. There were 2 late major adverse outcomes, a noncardiac related death (628 days) and a stroke (382 days). The mean mitral gradient decreased from 9.5 ± 3.4 to 5.5 ± 2.6 mm Hg (P < 0.01). Three patients were found to have high gradients, two presented with heart failure while another patient was found to have reduced leaflet motion and abnormal thickening postprocedure. The two patients with heart failure were treated with enoxaparin, which caused subsequent resolution of increased valve gradients in one patient. The other patient could not tolerate prolonged treatment from anticoagulation due to gastrointestinal bleeding. Three of 13 patients were treated with dual-antiplatelet therapy and were suspected to have valve thrombosis.

CONCLUSION: Thrombotic related dysfunction post-TMVR occurred in 15% (2/13) of patients and one patient had abnormal leaflet thickening that may have been thrombus related. Dual-antiplatelet therapy was used in all 3 cases suggesting the possible need for oral anticoagulation postmitral valve-in-valve therapy. © 2017 Wiley Periodicals, Inc.