Left atrial pressure and predictors of survival after percutaneous mitral paravalvular leak closure.

Published on Jul 14, 2017in Catheterization and Cardiovascular Interventions2.044
· DOI :10.1002/CCD.27179
Elad Maor21
Estimated H-index: 21
(Mayo Clinic),
Claire E. Raphael14
Estimated H-index: 14
(Mayo Clinic)
+ 7 AuthorsCharanjit S. Rihal96
Estimated H-index: 96
(Mayo Clinic)
Background Data on the clinical utility of left atrial (LA) hemodynamic monitoring during percutaneous mitral interventions are limited. Objectives To evaluate the association between intraprocedural LA pressures during percutaneous mitral paravalvular leak (PVL) closure and long term survival. Methods Patients who underwent mitral PVL repair with invasive LA pressure monitoring were divided at baseline to three tertiles based on their mean final LA pressure ( 30% of mean systolic blood pressure). Primary outcome was all-cause mortality. Results 134 patients (mean age 68 ± 12 years) were studied. Over 3 year mean follow-up, 81 (38%) patients died. The cumulative probability of death at 3 years was significantly higher among patients in the highest LA pressure tertile (56 ± 8% vs. 28 ± 5%, log rank P < 0.001). More than mild residual mitral regurgitation (MR) by transesophageal echocardiography (TEE) was associated with a 2.5-fold increased risk of death and patients in the highest LA pressure tertile had 2.2-fold higher mortality (P < 0.001 and = 0.003 respectively). After adjustment for residual MR by TEE, each 10% acute procedural reduction in LA pressures was associated with a significant 9% reduced risk of death (P = 0.023). Multivariate Cox regression with adjustment for multiple predictors of death showed that patients in lower LA pressure tertiles had 59% lower mortality (P = 0.003). Conclusion Lower LA pressure following mitral PVL closure is an independent predictor of improved survival, even after adjustment for residual MR. LA pressure monitoring may be a useful tool for procedural guidance during mitral PVL closure.
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