Myocardial Infarction: Difference between revisions

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==Myocardial Ischemia==


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 fast rhythm disturbance, causing a disbalance in supply and demand of energy.  
* 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.