septal defect

English Thesaurus

1. a congenital abnormality in the septum between the left and right sides of the heart (noun.state)

hypernym	:	congenital heart defect,
definition	:	a birth defect involving the heart (noun.state)

hyponym	:	atrial septal defect,
definition	:	an abnormal opening between the left and right atria of the heart (noun.state)

hyponym	:	ventricular septal defect,
definition	:	a common congenital heart defect; an abnormal opening in the septum dividing the ventricles allows blood to pass directly from the left to the right ventricle; large openings may cause congestive heart failure (noun.state)