Other Congenital Cardiac Anomalies By Lee B Beerman, MD, Children's Hospital of Pittsburgh of the University of Pittsburgh School of Medicine Reviewed / Revised Apr 2023 View Patient Education More Information Other structural congenital cardiac anomalies include the following: Pulmonary atresia with an intact ventricular septum Pulmonary valve stenosis Single ventricle with or without pulmonary stenosis Rare nonstructural cardiac anomalies include Congenital complete heart block Congenital metabolic errors leading to cardiomyopathy Long QT syndrome and other genetic arrhythmia syndromes with risks of severe and possibly fatal ventricular arrhythmias are discussed elsewhere.