Konno aortoventriculoplasty in children and adolescents: from prosthetic valves to the Ross operation.
BACKGROUND
In children with complex multilevel left ventricular outflow tract obstruction (LVOTO), the Konno aortoventriculoplasty is used to enlarge the aortic root and increase the size of the aortic valve implanted. We present our experience with the evolution of this surgical approach from prosthetic valves to the Ross operation.


METHODS
Between March 1982 and July 2000, 60 patients (36 males and 24 females) had 72 Konno aortoventriculoplasties (prosthetic valve and Konno group [57 patients; redo, 12] and Ross-Konno group [15 patients]). The patients' ages ranged from 5 days to 18 years (mean, 8.2 years). The underlying anatomic diagnoses were congenital aortic stenosis and LVOTO in 51 patients, coarctation of the aorta with bicuspid aortic valve in 13, severe aortic insufficiency associated with a ventricular septal defect in 8, interrupted aortic arch in 6, mitral stenosis in 6, atrioventricular septal defect in 5, and endocarditis in 3. There was no statistical difference in age or diagnosis between the two groups. The prosthetic valve group included 42 mechanical valves, 9 homografts, and 6 xenografts.


RESULTS
Follow-up ranged from 10 months to 18.5 years (mean, 9.7 years) in the prosthetic valve and Konno group compared with 5 months to 3.7 years (mean, 2.1 years) in the Ross-Konno group (p < 0.05). There were 10 early deaths and four late deaths in the prosthetic valve and Konno group as compared with one early death and two late deaths in the Ross-Konno group (p = not significant). Reoperations for LVOTO and aortic valve replacement were significantly higher in the prosthetic valve and Konno group as opposed to the Ross-Konno group (16 vs 0, p < 0.05) mainly because of the biological valve and Konno subgroup. There were no statistical differences in reexploration for bleeding, pacemaker insertion, and reoperations for indications other than LVOTO and aortic valve replacement between the two groups.


CONCLUSIONS
The Konno aortoventriculoplasty is a good surgical option for complex LVOTO. Patients with a prosthetic valve and Konno carry a high rate of reoperation. Early operative results with the Ross-Konno operation seem promising.
Erez
Eldad
E
Department of Surgery, Emory University School of Medicine, Atlanta, Georgia 30322, USA.
Kanter
Kirk R
KR
Tam
Vincent K H
VK
Williams
Willis H
WH
D000293:Adolescent; D001011:Aorta / Q000601:surgery*; D001020:Aortic Stenosis, Subvalvular / Q000601:surgery; D001024:Aortic Valve Stenosis / Q000151:congenital / Q000601:surgery*; D006348:Cardiac Surgical Procedures; D002648:Child; D002675:Child, Preschool; D005260:Female; D019918:Heart Valve Prosthesis Implantation; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D012086:Reoperation; D012189:Retrospective Studies; D016896:Treatment Outcome; D014694:Ventricular Outflow Obstruction / Q000601:surgery*