Cardiac enzymes are examined or studied to detect the level of proteins in the heart known as Troponin T (in English: TnT), troponin I (in English: TnI), and the protein myoglobin. , as well as the enzyme creatine phosphokinase (CPK), and it is worth noting that these enzymes and proteins are found in small levels in the blood in the normal situation, but in the event of damage to the heart, part of these proteins and enzymes leaks from the heart into the bloodstream, and thus Their levels rise above the normal limit, and although the rise may indicate damage to the heart muscle, a decrease in its supply of oxygen, and the possibility of a person having a heart attack, the rise does not necessarily mean the occurrence of the above, because some of these enzymes and proteins are present In other organs in the body, and that damage to these organs may cause their levels in the blood to rise as well, and therefore a physical examination and knowledge of the nature of the symptoms that the person in question complains of Other examinations are necessary to assess the condition.