"Heart malformations" refers to structural abnormalities or defects in the heart. It means there is something not quite right with the way the heart is formed or how it functions. Full definition
Mutation - positive probands and family members showed various congenital heart malformations as well as LVNC. (mdc-berlin.de)
This nutrient is critical to preventing birth defects such as cleft palate, cleft lip, major heart malformations, and hydrocephalus. (thehealthyhomeeconomist.com)
Canine atrial septal defect (ASD) is a relatively rare congenital heart malformation in which the heart has a hole between its upper chambers. (petsmagazine.com.sg)