hole in the heart

noun

1. a defect of the heart in which there is an abnormal opening in any of the walls dividing the four heart chambers
2. (as modifier)a hole-in-the-heart operation

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012