“…1,17 The association of quadricuspid aortic valve with patent ductus arteriosus was first reported in 1923 by Simonds as a postmortem finding. 18 Other associated anomalies are rare and includes coronary artery anomalies, 9 non-obstructive cardiomyopathy, fibromuscular sub-aortic stenosis, 7 rupture sinus of Valsalva, [19][20][21] atrial septal defect, 11,22 partial anomalous pulmonary venous connection, 23 ventricular septal defect, 24 transposition of great arteries, 25 tetralogy of Fallot, 26,27 pulmonary valve stenosis, and congenital complete heart block. Infective endocarditis is also a potential complication 7,11,28 with reported incidence of 1.4%.…”