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(詳細はelectrocardiogram findings and cardiac markers (blood tests for heart muscle cell damage).〔(Myocardial infarction: diagnosis and investigations ) - GPnotebook, retrieved November 27, 2006.〕 A coronary angiogram allows visualization of narrowings or obstructions on the heart vessels, and therapeutic measures can follow immediately. At autopsy, a pathologist can diagnose a myocardial infarction based on anatomopathological findings. A chest radiograph and routine blood tests may indicate complications or precipitating causes and are often performed upon arrival to an emergency department. New regional wall motion abnormalities on an echocardiogram are also suggestive of a myocardial infarction. Echo may be performed in equivocal cases by the on-call cardiologist.〔''DE Fenton et al.'' (Myocardial infarction ) - eMedicine, retrieved November 27, 2006.〕 In stable patients whose symptoms have resolved by the time of evaluation, Technetium (99mTc) sestamibi (i.e. a "MIBI scan") or thallium-201 chloride can be used in nuclear medicine to visualize areas of reduced blood flow in conjunction with physiologic or pharmocologic stress.〔〔(HEART SCAN ) - Patient information from University College London. Retrieved November 27, 2006.〕 Thallium may also be used to determine viability of tissue, distinguishing whether non-functional myocardium is actually dead or merely in a state of hibernation or of being stunned. ==Diagnostic criteria== According to the WHO criteria as revised in 2000, a cardiac troponin rise accompanied by either typical symptoms, pathological Q waves, ST elevation or depression or coronary intervention are diagnostic of MI. Previous WHO criteria formulated in 1979 put less emphasis on cardiac biomarkers; according to these, a patient is diagnosed with myocardial infarction if two (probable) or three (definite) of the following criteria are satisfied: # Clinical history of ischaemic type chest pain lasting for more than 20 minutes # Changes in serial ECG tracings # Rise and fall of serum cardiac biomarkers such as creatine kinase-MB fraction and troponin 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Myocardial infarction diagnosis」の詳細全文を読む スポンサード リンク
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