car·di·ac 
/ˈkɑɚdiˌæk/ adjective
always used before a noun /ˈkɑɚdiˌæk/ adjective medical : of or relating to the heart
▪ cardiac problems/disease/surgery ▪ cardiac patients [=people with heart disease or heart problems] ▪ She went into cardiac arrest. [=her heart stopped beating]
▪ cardiac problems/disease/surgery ▪ cardiac patients [=people with heart disease or heart problems] ▪ She went into cardiac arrest. [=her heart stopped beating]
