Learn how to say Cardiac correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word cardiac:
1relating to the heart.
2relating to the part of the stomach nearest the oesophagus.
a heart attack.
late Middle English (as a noun denoting heart disease): from French cardiaque or Latin cardiacus, from Greek kardiakos, from kardia ‘heart or upper opening of the stomach’. The adjective dates from the early 17th century