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==Diagnosis of myocardial infarction== | ==Diagnosis of myocardial infarction== | ||
The diagnosis of acute myocardial infarction is not only based on the ECG. A myocardial is defined as:<cite>Alpert</cite> | |||
* | * Heartenzymes ([[w:Creatine_kinase|CKMB]] or [[w:Troponin|Troponin T]]) are elevated in the blood AND | ||
* | * One of the following crietria are met: | ||
** | ** The patient has typical complaints | ||
** | ** The ECG shows toont ST elevation or depression | ||
** | ** [[pathologische Q golven]] develop on the ECG | ||
** | ** A coronary intervention had been performed (such as stent placement) | ||
So detection of elevated serum heartenzymes is more important than ECG changes. However, the heartenzymes can only be detected in the serum 5-7 hours after the onset of the myocardial infarction. So especially in the first few hours after the myocardial infarction the ECG can be very usefull. | |||
==Development of the ECG during persistent ischemia== | ==Development of the ECG during persistent ischemia== |