Cardiac is the medical term usually used when referring to the heart. When joined as a combining form with another suffix or word to form another term, cardiac becomes Cardio-. For example, Cardiovascular.
Cardio- = heart and vascular = blood vessels.
Cor is another word that is Latin for heart. It is used in medicine to refer to the heart. For example, Cor pulmonale (a severe condition of the heart). Another term from the Latin root is Coronary, which also means heart. For example, Coronary Artery Bypass Graft, AKA CABG (called also "cabbage"), is the medical term for a "heart bypass".
Pericardial is the medical term meaning pertaining to the pericardium, the membrane surrounding the heart.
Pericarditis is inflammation of the sac around the heart.
Cardiac auscultation is the medical term meaning listening to the heart.
Circumferential
Myocardial infarction is the medical term meaning damage to the heart muscle.
Myelitis is the medical term meaning inflammation of the fibrous tissue surrounding a nerve. An example is poliomyelitis.
Fibrillation is the medical term meaning rapid uncoordinated shuddering of the heart.
Situs inversus is the medical term meaning reversal of the normal position of the heart.
Cardiopathy is the general term meaning any disease of the heart.
CardiocentesisCardiocentesis
Periarteritis
periapical