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A cardiac enzyme test is performed after a heart attack to asses whether the heart is damaged. A cardiac enzyme test is a blood test that measures the cardiac enzymes in the blood. A technician will insert a needle into a person’s arm and draw a sample of blood.
The lactate dehydrogenase (LDH) test looks for signs of damage to the body’s tissues. LDH is an enzyme found in almost every cell of your body, including your blood, muscles, brain, kidneys, and pancreas.