Publication date: 2018-09-19 12:50
High-sensitivity troponin tests measure the same protein in the blood as the standard test but at much lower levels. Because these new generation of tests are more sensitive than standard ones, they become positive sooner and may help detect acute coronary syndrome earlier. The hs-troponin test may also be positive in people with stable angina and even in people with no symptoms. In these cases, a positive test indicates an increased risk of future heart events such as heart attacks. Hs-troponin is not approved in the . at this time, but research is ongoing and it may become available soon. It is already routinely used in Europe, Canada, and other countries as well.
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The free PSA test is sometimes used to help to determine whether a biopsy should be done when the total PSA is only slightly elevated. PSA is an enzyme (protein that helps different chemical reactions to occur) and when it is released into the blood, some circulating proteins inactivate PSA by binding to it. Benign prostate cells in BPH tend to release PSA that is not active (and, therefore, less likely to be bound by circulating proteins) and cancerous prostate cells tend to release PSA that is already protein-bound.
American Academy of Family Physicians: Heart Attack
National Heart, Lung, and Blood Institute: What is a Heart Attack?
American Heart Association: Heart Attack
Large doses of some drugs, such as cyclophosphamide and methotrexate, may increase or decrease PSA levels.
Other tests may also be recommended if either the PSA or the DRE is found to be abnormal. A urinalysis may be done, for example, to check for urinary tract infection and imaging tests, such as an ultrasound, may be done to examine the prostate.
A troponin test will usually be ordered when a person with a suspected heart attack first comes into the emergency room, followed by a series of troponin tests performed over several hours.
Troponin I and troponin T are proteins found in heart muscle and are released into the blood when there is damage to the heart.
Zafari, A. M. and Afonso, L. (Updated 7566 September 69). Myocardial Infarction. Medscape Reference [On-line information]. Available online http:///article/655969-overview through http://. Accessed September 7566.
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