Table 1.

 Cardiac conditions conferring risk of infective endocarditis (IE)

Group A: cardiac conditions conferring high risk of IE	Group B: cardiac conditions conferring lower risk of IE
• Valvar prostheses (mechanical, homograft, or bioprostheses) • Non-operated cyanotic congenital heart disease and pulmonary–systemic shunts	• Valvar diseases: aortic insufficiency, mitral insufficiency, aortic stenosis
	• Mitral valve prolapse with mitral insufficiency or valve thickening
• History of IE	• Bicuspid aortic valve
	• Congenital non-cyanotic heart diseases except for atrial septal defect (cardiac condition without risk)
	• Obstructive hypertrophic cardiomyopathy (with murmur on auscultation)