What are the sensitive indicators for diagnosing myocardial infarction?

The sensitive index of myocardial infarction is cardiac troponin (cTn), which has the advantages of high myocardial specificity, long window period and high sensitivity, can reflect the severity of myocardial injury and is the first choice marker for diagnosis of myocardial infarction.(cardiac troponin, cTn). cTn is the first choice marker for the diagnosis of myocardial infarction, with the following advantages: 1. High myocardial specificity: cTn only exists in myocardial cells, and is rapidly released into the blood when myocardial injury occurs. The content of cTn in other tissues and organs is very low, so it has high specificity. 2. Long window period: The window period of cTn is relatively long, even after a long time after myocardial infarction, the increase of cTn can still be detected in the blood, which is conducive to diagnosis and monitoring of the disease. 3. High sensitivity: The sensitivity of cTn to myocardial infarction is relatively high, even if the myocardial infarction area is small or the symptoms are atypical, the increase of cTn can also be detected. 4. It can reflect the severity of myocardial injury: cTn level is closely related to the area and prognosis of myocardial infarction, and can be used as an index to evaluate the severity and prognosis of the disease. In addition to cTn, myocardial enzymes, ECG and other indicators can also be used to diagnose myocardial infarction, but cTn is currently the most sensitive and specific index. In clinical practice, cTn and other indicators are usually detected at the same time to improve the accuracy of diagnosis. It should be noted that an increase in cTn levels does not necessarily mean that a myocardial infarction has occurred. It also needs to be combined with clinical symptoms, electrocardiogram, etc. Comprehensive judgment is made based on other test results. In addition, the detection of cTn levels is also affected by some factors, such as age, gender, muscle injury, renal insufficiency, etc., so these factors need to be considered comprehensively when interpreting cTn results. For patients suspected of myocardial infarction, they should seek medical attention as soon as possible for relevant examinations for timely diagnosis and treatment. For patients with confirmed myocardial infarction, treatment should be carried out according to doctor's advice, and cTn and other indicators should be regularly reexamined to monitor the change of disease condition.