title: [Re-aortic valve operations in children].
abstract: We have performed aortic valve replacement (AVR) with mechanical valve, with/without annular enlargement in pediatric patients with left ventricular outflow tract obstruction (LVOT). Twenty-two patients underwent mechanical AVR between May 1993 and December 2012. The cumulative survival rates by the Kaplan-Meier method were 95% in 5 year, and 95% in 10 year. Long-term result of mechanical AVR with/without annular enlargement in children is excellent. Therefore, it should be the 1st choice of surgical treatment at our institute. In this strategy, we had total 10 re-operation cases. Two cases:Konno operation after performing surgical aortic valvotomy, 6 cases:Konno operation after resection of subaortic stenosis, 1 case:re-valve replacement because of thrombus formation at mechanical valve, and 1 case:re-operation with somatic growth. At the age of operation, 2 years old and over cases had postoperative estimated effective orifice area index (EOAI)>0.85 cm2/m2 in the time of 20 years old. Since some issues concerning anticoagulation-related complications remain, careful observation is mandatory.
authors.affiliation: Department of Cardiovascular Surgery, Nagano Children's Hospital, Azumino, Japan.
authors.forename: Tai
authors.initials: T
authors.lastname: Fuchigami
authors.forename: Yorikazu
authors.initials: Y
authors.lastname: Harada
mesh_terms: D000293:Adolescent; D001021:Aortic Valve / Q000601:surgery*; D005260:Female; D019918:Heart Valve Prosthesis Implantation; D006801:Humans; D007223:Infant; D012086:Reoperation; D014694:Ventricular Outflow Obstruction / Q000601:surgery