Investigation of outcomes following transcatheter edge to edge repair of the mitral valve versus medical management alone in patients with cardiogenic shock and mitral regurgitation.

ABSTRACT

Study objective: Assessing if Transcatheter Edge to Edge Repair (TEER) with Mitraclip™ in patients with moderate to severe mitral regurgitation (MR) and cardiogenic shock (CS) improves outcomes compared to medical management alone. Design: A single-center, retrospective study was performed in an urban tertiary referral center. Setting: Rush University Medical Center, United States. Participants: Adult patients presenting with CS and moderate to severe MR between 2012 and 2021 were included. Interventions: Undergoing Mitral TEER with Mitraclip versus medical management alone. Main outcome measures: Major adverse cardiovascular events (MACE) defined as cardiovascular death, heart failure admission, stroke, and myocardial infarction assessed at 30 days, 6 months, and 1 year. The secondary outcome was a change in New York Heart Association (NYHA) classification at 30 days and 6 months. Results: There were 28 patients included in the medical management and 33 in the mitral valve TEER groups. There was a decreased MACE in the intervention group at 30 days (24.2 % vs. 46.4 %, p ≤0.001) and 6 months (27 % vs. 75 %, p = 0.002), though not at 1 year (29.4 % vs. 41.7 %, p = 0.42). At 30 days, more patients in the mitral valve TEER group improved to NYHA classes I/II compared to medical management alone (10 [35.7 %] vs. 16 [50 %], p = 0.043). There were no differences in NYHA classes I/II at 6 months (7 [43.7 %] vs. 13 [54.2 %], p = 0.63). Conclusion: Mitral valve TEER using the Mitraclip™ system improves mid-term cardiovascular compared to medical management alone in patients with CS but does not improve mortality.