Crawley IS, Morris DC, Silverman BDValvular heart disease. In: Hurst JW, ed. The Heart, Arteries, and Veins. New York, NYMcGraw-Hill Book Company; 1978:1032-1033.
2.
Dajani AS, Bisno AL, Chung KJ, et al. Prevention of bacterial endocarditis: recommendations by the American Heart Association. JAMA.1990;264: 2919-2922.
3.
Fryns J-P.Chromosome 21, trisomy 21. In: Buyse ML, ed. Birth Defects Encyclopedia. Dover, MA: Center for Birth Defects Information Services, Incorporated; 1990:391-393.
4.
Tandon R., Edwards JECardiac malformations associated with Down syndrome. Circulation . 1973;47:1349-1355.
5.
Naganuma M.Chromosomal aberrations and congenital heart diseases. Jpn Circ J. 1978;42:1124-1130.
6.
Schneider DS , Zahka KG, Clark EB, Neill CA, Baltimore-Washington Infant Study Group.Patterns of cardiac care in infants with Down syndrome. Am J Dis Child.1989;143:363-365.
7.
Awadallah S. , Kavey R-E., Byrum C., et al. The changing pattern of infective endocarditis in childhood. Am J Cardiol.1991 ;68:90-94.
8.
Carey JCHealth supervision and anticipatory guidance for children with genetic disorders (including specific recommendations for trisomy 21, trisomy 18, and neurofibromatosis I). Pediatr Clin North Am.1992;39:25-53.