Operative Treatment of Mitral Valve Regurgitation Due to Chordal Rupture and/or Papillary Muscle Rupture

Kim, Siho; Bang, Jung Heui; Woo, Jong Soo

Abstract

BACKGROUND: As the rupture of chordae and/or papillary muscle became the main cause of mitral valve regurgitation, mitral reconstructive surgery has a very important role. In this regard, we analyzed the clinical result and postoperative early result of operative treatment performed in our hospital. MATERIAL ANDMETHOD: For this analysis, forty nine patients (male 26, female 23, mean age 49.0+/-16.5) who underwent mitral valve operation caused by the rupture of chordae and/or papillary muscle from August 1991 to April 2002 were reviewed. Among forty nine patients, twenty two (44.9%) received mital valve reconstruction and twenty seven (59.2%) received mitral valve replacement. RESULT: As to the pathological etiology of rupture of mitral and papillary muscle, twenty five cases (51.0%) were nonspecific degeneration, eleven cases (22.4%) were myxomatous degeneration, seven cases (14.3%) were subacute bacterial endocarditis. Three patients suffered mortality after operation (6.1%) and valve replacement was performed again on one patient because of remnant mitral insufficiency after valve reconstruction. The 5-year survival rate after operation for the entire mitral valve regurgitation patients was 81.4%. We have also compared and analyzed the operation results of a group of patients who underwent valve reconstruction and the other group of patients who underwent valve replacement from thirty six patients who had suffered from mitral valve regurgitation caused by degenerative disease. The mortalities were 0% and 14.3%, respectively and the 5-year survival rates were 90.2% and 64.3%, respectively, but there were no statistical significance.
CONCLUSION
The most common pathological etiology of mitral valve regurgitation caused by rupture of chordae and/or papillary muscle was nonspecific degeneration. In case of degenerative disease is the cause of mitral valve regurgitation, valve reconstruction showed better long-term effects in many respects and better operation results compared to valve replacement.