The test that's most specific for myocardial damage is:
Troponin I
The correct answer is Troponin I.
Cardiac troponin I is a regulatory protein of heart muscle whose isoform is not found in skeletal muscle, so it is the most specific (and sensitive) marker of myocardial damage. It rises 3–6 hours after injury and stays raised for 7–10 days.
Total creatine kinase is also released from skeletal muscle and brain; myoglobin rises earliest but is non-specific; CK-MB is fairly cardiac-specific but less so than troponin and returns to normal within 2–3 days.
Short trick: Earliest marker = Myoglobin; most specific = Troponin I.
Important Questions from Medical Surgical Nursing
A patient is very restless while receiving IV fluids to treat dehydration. The IV catheter has slipped out of the vein and fluid is delivered to the surrounding tissues under the skin, causing swelling. Which term best describes this occurrence?
Medical asepsis differs from surgical asepsis in that it is aimed at:
The cerebrospinal fluid is secreted by ________
The inflammatory / exudative phase of wound healing will last for
The person who becomes short of breath with little exertion, such as when eating a meal, has what kind of respiratory condition?
