Myocardial Infarction: Difference between revisions
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→Diagnosis of myocardial infarction
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[[Image:Stelevatie_en.png|thumb|ST elevation is measured 60ms or 80ms after the J point]] | [[Image:Stelevatie_en.png|thumb|ST elevation is measured 60ms or 80ms after the J point]] | ||
The diagnosis of acute myocardial infarction is not only based on the ECG. A myocardial is defined as:<cite>Alpert</cite> | The diagnosis of acute myocardial infarction is not only based on the ECG. A myocardial infarction is defined as:<cite>Alpert</cite> | ||
* Elevated blood levels of cardiac enzymes ([[w:Creatine_kinase|CKMB]] or [[w:Troponin|Troponin T]]) AND | * Elevated blood levels of cardiac enzymes ([[w:Creatine_kinase|CKMB]] or [[w:Troponin|Troponin T]]) AND | ||
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:ST elevation of more than 2mm in two chest leads or more than 1 mm in two adjacent limb leads | :ST elevation of more than 2mm in two chest leads or more than 1 mm in two adjacent limb leads | ||
:ST elevation is measured 60ms or 80ms after the J-point | :ST elevation is measured 60ms or 80ms after the J-point | ||
A study using MRI to diagnose myocardial infarction has shown that more emphasis on ST depression could greatly improve the yield of the ECG in the diagnosis of myocardial infarction (sensitivity increase from 50% to 84%).<cite>martin</cite> | |||
Myocardial infarction diagnosis in left or right bundle branch block can be difficult, but is explained in these seperate chapters: | Myocardial infarction diagnosis in left or right bundle branch block can be difficult, but is explained in these seperate chapters: | ||