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Article Abstract
Objective: Transcatheter edge-to-edge repair (TEER) is a prominent therapeutic option for mitral regurgitation (MR) patients. However, it lacks objective parameters to assess procedural efficacy. This study aims to investigate pulmonary venous (PV) flow as a surrogate for valvular hemodynamics and its associations to clinical outcomes.
Methods: Consecutive MR patients who underwent TEER in our center from January 2020 to October 2021 were retrospectively investigated. PV flow parameters were measured before and after TEER, including velocity (cm/s), velocity time integral (VTI) (cm), and systolic/diastolic ratios. Primary outcomes were 1, 6, and 12 months heart failure hospitalizations (HFH) and 1 year all-cause mortality.
Results: The cohort consisted of 80 patients. The mean age was 74.76 ± 10.13 years, 26 with primary and 54 with secondary MR. Systolic wave parameters improved significantly after TEER: mean peak velocity increased from 9.94 ± 31.95 to 35.74 ± 15.03 cm/s, and VTI from 3.62 ± 5.99 to 8.33 ± 4.72 cm. Furthermore, systolic to diastolic VTI and peak-velocities ratios showed significant improvement of 0.39 ± 0.63 to 0.81 ± 0.47 and 0.23 ± 0.66 to 0.91 ± 0.43, respectively. Using multivariable analysis, higher post-procedural S was associated with less HFH: 1-month (OR = 0.72, CI [0.52,0.98]), 6-months (OR = 0.8, CI [0.66,0.97]), 1-year (OR = 0.85, CI [0.73,0.99]), as well as reduced 1-year mortality (OR = 0.64 95% CI [0.45,0.91]). Furthermore, compared to patients with SVTI ≥ 3, patients with SVTI < 3 had a higher risk for HFH at: 1-month (OR = 16.59, CI [1.48,186.02]), 6-months (OR = 12.2, CI [1.69,88.07]), and 1-year (OR = 8.61, CI [1.27,58.27]), as well as elevated 1-year mortality (OR = 8.07, 95% CI [1.04,62.28]).
Conclusion: PV flow was significantly improved following TEER, and several hemodynamic parameters were associated with HFH and mortality. These results may offer a basis for establishing future procedural goals to ensure better clinical outcomes.
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| http://dx.doi.org/10.1016/j.hjc.2024.05.015 | DOI Listing |
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