Abstract Background/Introduction The uncertainty, whether TEER may improve clinical outcome was explored in two randomized trial targeting patients with symptomatic heart failure (HF), reduced left ventricular ejection fraction (LVEF) and moderate or severe mitral regurgitation (MR) – the MITRA-FR and COAPT trials. So far the COAPT trial is the only randomised trial that showed lower mortality in TEER group. Purpose The objective of this study is to compare the results of single Mitra-Clip centre with COAPT trial, with the focus on baseline population characteristic and 2-years overall and HF related mortality rates. Methods This study was designed as a retrospective cohort study that included 108 consecutively enrolled, sympomatic patients with moderate-to-severe and severe SMR and HF who underwent mitral valve repair with the MitraClip device (Abott) in John Paul II Hospital in Krakow, between 2014 and 2021. The exclusion criteria were cardiogenic shock, end-stage right or left heart failure or severe aortic valve disease. Results Among all patients 86 (79.6%) had fulfilled all Copat criteria. Initially one or two clips were implanted, and in over 90% of patients only mild and moderate (I or II degree) residual MR was observed in echocardiography at discharge and during follow up. In most most patients we also observed significant improvement in clinical status – before the procedure 86% patients were in NYHA class III and IV, and afterwards only 32% at discharge and 34% during follow-up. Death from any cause in the study population between 2016 and 2021 occurred in 16 % (n=31) and heart failure related death was observed in 10 % (n=16) patients. Conclusions Despite some differences between our study and COAPT trial, especially concerning patient selection, left ventricle structure and severity of MR, the overall 2 years mortality in our study was 16% vs. 29% in COAPT trial. This confirms that also some non-COAPT patients as well may contribute from TEER procedure, and beside the patients selection the procedural success significantly contributes to mortality benefit.
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