I. ˈkär-dē-ˌak adjective
Etymology: Latin cardiacus, from Greek kardiakos, from kardia
Date: 1601
1.
a. : of, relating to, situated near, or acting on the heart
b. : of or relating to the cardia of the stomach
2. : of, relating to, or affected with heart disease
cardiac patients
II. noun
Date: circa 1929
: a person with heart disease