You are working in the emergency department (ED) when a client arrives reporting substernal and left arm discomfort that has been going on for about 3 hours. Which laboratory test will be most useful in determining whether you should anticipate implementing the acute coronary syndrome (ACS) standard protocol?

Troponin I level

Explanation:

High troponin levels can indicate a problem with the heart. The heart releases troponin into the blood following an injury, such as a heart attack. Very high troponin levels usually mean that a person has recently had a heart attack. The medical term for this attack is myocardial infarction