Key result
Mitral valve plasty for idiopathic mitral valve chordal rupture in four infants successfully improved severe mitral regurgitation to trivial or mild, with all patients surviving at a median follow-up of 13.8 months.
Why the study?
Does mitral valve plasty improve mitral valve regurgitation in infants with idiopathic mitral valve chordal rupture?
Case Report (n=4)
No
Does mitral valve plasty improve mitral valve regurgitation in infants with idiopathic mitral valve chordal rupture?
Mitral valve plasty using adult techniques (quadrangular resection with annular plication) is feasible and effective for treating severe mitral regurgitation due to idiopathic chordal rupture in infants.
Hypothesis-generating for mitral valve plasty in infants with idiopathic chordal rupture; prospective studies needed to assess durability.
INTRODUCTION: Idiopathic mitral valve chordal rupture is rare among infants. Once it has occurred, acute heart failure progresses, and emergency surgical repair is necessary in most cases. Our surgical experience with idiopathic mitral valve chordal rupture is reported. PATIENTS AND METHODS: From September 2008 to May 2012, four infants (3 males, 1 female; median age 5.5 months) underwent mitral valve plasty for severe mitral valve regurgitation due to prolapse of posterior mitral valve leaflet. Patient history, surgical procedure, operation time, mortality, postoperative echocardiography data (mitral valve regurgitation grade: 0-trivial, mild, moderate, severe, transmitral flow: TMF) and pathology were examined. RESULTS: Three cases required emergency surgery; 1 case, elective surgery. Intraoperative findings showed chordal rupture of the P2 segment in 3 cases and P1 + P3 segments in 1 case. Quadrangular resection with annular plication was performed for 1 case. Quadrangular resection with annular plication and the Kay procedure were performed for 3 cases. Mitral valve regurgitation improved from severe to trivial-mild in all cases. Pathological examination showed a myxomatous degenerative change in the mitral valve. CONCLUSION: Mitral valve plasty was performed for idiopathic mitral valve chordal rupture in infants. The surgical procedures were the same as for adult cases and achieved satisfactory results.
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Yanase et al. (2013) conducted a case report in Idiopathic rupture of mitral valve posterior chordae (n=4). Mitral valve plasty was evaluated on Postoperative mitral valve regurgitation grade and mortality. Mitral valve plasty for idiopathic mitral valve chordal rupture in four infants successfully improved severe mitral regurgitation to trivial or mild, with all patients surviving at a median follow-up of 13.8 months.
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