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Myocardial Infarction: Difference between revisions
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Ischemia occurs when part of the heartmuscle, the myocardium, is deprived form oxygen and nutrients. | Ischemia occurs when part of the heartmuscle, the myocardium, is deprived form oxygen and nutrients. | ||
Common causes of ischemia are: | Common causes of ischemia are: | ||
* Narrowing or obstruction of a coronary artery. | * Narrowing or obstruction of a coronary artery. | ||
* A | * A rapid arrhythmia, causing a disbalance in supply and demand of energy. | ||
A short period of ischemia causes ''reversibele'' effects: The heartcells will be able to recover. When the ep[isode of ischemia lasts for a longer period of time, heartmuscle cells will die. This is called a '''heart attack''' or '''myocardial infarction'''. That is why it is critical to recognize ischemia on the ECG in an early stage. | A short period of ischemia causes ''reversibele'' effects: The heartcells will be able to recover. When the ep[isode of ischemia lasts for a longer period of time, heartmuscle cells will die. This is called a '''heart attack''' or '''myocardial infarction'''. That is why it is critical to recognize ischemia on the ECG in an early stage. | ||