English: 3d surface model (from two sides) of ...

English: 3d surface model (from two sides) of skeletal troponin complex in Ca free state (troponin T purple, I cyan, C green) from PDB 1YV0. Ref.: Vinogradova, M.V., Stone, D.B., Malanina, G.G., Karatzaferi, C., Cooke, R., Mendelson, R.A., Fletterick, R.J. (2005) Ca2+-regulated structural changes in troponin Proc.Natl.Acad.Sci.USA 102: 5038-5043 PMID 15784741 (Photo credit: Wikipedia)

The troponin blood test measures the levels of certain proteins called troponin T and troponin I in the blood. These proteins are released when the heart muscle has been damaged, such as in a heart attack. The more damage there is to the heart, the greater the amount of troponin T and I there will be in the blood.
In most cases, troponin levels are increased within six hours of a heart attack, but in almost everyone there will be an elevated troponin level after 12 hours.
Troponin levels caused by heart damage often remain high for one to two weeks.
The troponin blood tests are commonly ordered if a heart attack or damage to the heart is suspected. If the troponin levels are in the normal range 12 hours after chest or other pains associated with a heart attack, this almost always means that the pain was not caused by a heart attack.
Normal Results
A normal result for troponin l is generally less than 10 micrograms/liter.
A normal result for troponin T is generally 0-0.1 micrograms/liter.
Abnormal Results
If the troponin levels are increased, this usually means that there has been heart damage. If the troponin levels are really elevated, then it is very likely that the patient has suffered a heart attack.
Other Possible Causes For Elevated Troponin Levels
Other medical problems have been associated with elevated troponin levels:
Abnormally fast heartbeat
Pulmonary hypertension (High blood pressure in lung arteries)
Pulmonary embolus (Blockage of a lung artery by a tumor cell, fat or blood clot)
Congestive heart failure
Coronary artery spasm (A temporary, sudden narrowing of one of the arteries that supply blood to the heart resulting in stopping or slowing the blood flow through the artery)
Myocarditis (Inflammation of the heart muscle generally caused by a virus)
Strenuous exercise
Trauma to the heart (accident, fall)
Cardiomyopathy (Weakening of the heart muscle)
Cardiac angioplasty/stenting
Heart defibrillation (Shocking of the heart)
Open heart surgery
Kidney disease

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