Omari B, Shapiro S, Ginzton L, Robertson JM, Ward J, Nelson RJ, Bayer AS. Predictive risk factors for periannular extension of native valve endocarditis. Clinical and echocardiographic analyses. Chest. 1989;96:1273 1279. 140. McMahon CJ, Ayres N, Pignatelli RH, Franklin W, Vargo TA, Bricker JT, El-Said HG. Echocardiographic presentations of endocarditis, and risk factors for rupture of a sinus of Valsalva in childhood. Cardiol Young. 2003;13:168 172. 141. Carpenter JL. Perivalvular extension of infection in patients with infec- tious endocarditis. Rev Infect Dis. 1991;13:127 138. 142. Rohmann S, Seifert T, Erbel R, Jakob H, Mohr-Kahaly S, Makowski T, G rge G, Oelert H, Meyer J. Identification of abscess formation in native-valve infective endocarditis using transesophageal echocardiog- raphy: implications for surgical treatment. Thorac Cardiovasc Surg. 1991;39:273 280. doi: 10.1055/s-2007-1019985. 143. Nomura F, Penny DJ, Menahem S, Pawade A, Karl TR. Surgical inter- vention for infective endocarditis in infancy and childhood. Ann Thorac Surg. 1995;60:90 95. 144. Jones HR Jr, Siekert RG, Geraci JE. Neurologic manifestations of bacte- rial endocarditis. Ann Intern Med. 1969;71:21 28. 145. Venkatesan C, Wainwright MS. Pediatric endocarditis and stroke: a single-center retrospective review of seven cases. Pediatr Neurol. 2008;38:243 247. doi: 10.1016/j.pediatrneurol.2007.12.009. 146. Niwa K, Nakazawa M, Tateno S, Yoshinaga M, Terai M. Infective en- docarditis in congenital heart disease: Japanese national collaboration study. Heart. 2005;91:795 800. doi: 10.1136/hrt.2004.043323. 147. M gge A, Daniel WG, Frank G, Lichtlen PR. Echocardiography in infec- tive endocarditis: reassessment of prognostic implications of vegetation size determined by the transthoracic and the transesophageal approach. J Am Coll Cardiol. 1989;14:631 638. 148. Saxena A, Aggarwal N, Gupta P, Juneja R, Kothari SS, Math R. Predictors of embolic events in pediatric infective endocarditis. Indian Heart J. 2011;63:237 240. 149. 