How do they know a person had a heart attack after the fact?

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How do they know a person had a heart attack after the fact?

In: Biology

Because there is an enzyme that is present in the blood that only appears after a heart attack.

Answer.

From the Electrocardiograms. The heart has little bumps called ‘nodes’ on it. The nodes send out electrical signals to the rest of the heart to make sure it keeps pumping right. Electrocardiograms [ECGs, or EKGs] measure the electrical out put of the heart. A trained person can look at an EKG and see what is going on with the heart.

new cases you look at the ECG and the enzymes with the patient history. With an old one the best way is to ask the patient and you can see some specific changes in ECG