Prior surgical mitral commissurotomy and echocardiographic score influence in mitral balloon valvuloplasty. Immediate post procedure results

Abstract Introduction Percutaneous mitral balloon valvuloplasty is effective in mitral stenosis. Objectives: to evaluate prior mitral surgical commissurotomy (PMC) and echocardiographic score (ES) in the results and complications of mitral balloon valvuloplasty (MBV). Methods From 1987 to 2013, 526 procedures with Inoue balloon, double or single Balt balloon technique; 480 without PMC named primary MBV group (PMBVG) and 46 that have been submitted to PMC, the PMC group. The PMCG was older than PMBVG (42.7±12.4 vs 36.9±12.5 years, p=0.0030). Gender, atrial fibrilation and NYHA functional class were similar. In PMBVG and PMCG, respectively, ES were 7.2±1,4 and 7.7±1.5 points (p=0.0158) and mitral valve area (MVA) 0.94±0.21 and 1.00±0.22 cm2 (p=0.0699). Results Pre-MBV: mean pulmonary artery pressures (MPAP) were 37.8±14.2 and 37.6±14.4 mmHg, p=0.9515; mean gradient (MG) 19.6±6.9 and 18.3±6.9 mmHg, p=0.2342; MVA 0.90±0.21 and 0.93±0.19 cm2, p=0.4092, respectively, whem compare PMBVG and PMCG. Post-MBV: MPAP were 26.8±10.2 and 26.6±10.9 mmHg, p=0.9062; MG 5.4±3.5 and 6.3±4.2 mmHg, p=0.1492; MVA 2.04±0.42 and 1.92±0.41 cm2, p=0.0801, respectively. Mitral regurgitation (MR) were similar pre and post-MBV. Severe MR post-MBV in 10 patients: 8 in PMBVG and 2 in PMCG, p=0.2048. As there were not found significant diferences, the total group were divided in ES ≤8 and >8 groups: Pre-MBV: MPAP 37.5±13.9 and 39.3±16.6 mmHg, p=0.4041; MG 19.7±6.8 and 18.3±7.3 mmHg, p=0.1753; MVA 0.90±0.21 and 0.94±0.20 cm2, p=0.0090 respectively. Post-MBV: MPAP 26.7±10.1 and 28.0±10.6 mmHg, p=0.3730, MG 5.5±3.6 and 5.5±3.3 mmHg, MVA 2.06±0.42 and 1.90±0.40 cm2, p=0.0090. Conclusion The groups with and without prior mitral commissurotomy in MBV were compare and no differences were found in pre- and post-procedure, as mean pulmonary artery pressure, mean mitral gradient, mitral valve area, and mitral regurgitation. Although PMCG was older, with higher ES, its hemodynamics datas were similar. Whem the entire group was divided based on echo scores, those with echo scores >8 had highse MV (p=0.0090). and smaler mitral valve areas post-valvuloplasty. The valve anatomy were more important than prior commissurotomy. Funding Acknowledgement Type of funding source: None