Myocardial Infarction: Difference between revisions

Myocardial Infarction (view source)

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 *[[MI Dagnosis in Paced Rhythm]]
-==Development of the ECG during persistent ischemia==
-[[Image:AMI_evolutie.png|thumb| The evolution of an infarct on the ECG. ST elevation, Q wave formation, T wave inversion, normalisation with a persistent Q wave]]
-[[Image:PathoQ.png|thumb| A [[pathological Q wave|pathological Q wave]]]]
-The cardiomyocytes in the ''subendocardial'' layers are especcially vulnerable for a decreased perfusion. Subendocardial ischemia manifests as ST depression and is usually reversible. In a myocardial infarction ''transmural ischemia'' develops.
-In the first hours and days after the onset of a myocardial infarction, several changes can be observed on the ECG. First, '''large peaked T waves''' (or ''hyperacute'' T waves), then '''ST elevation''', then'''negative T waves''' and finally '''[[pathological Q waves]]''' develop.
-{| class="wikitable"
-|-
-|+'''Evolution of the ECG during a myocardial infarct'''
-|-
-!
-!see figure
-!change
-|-
-!minutes
-| not in figure
-b
-| hyperacute T waves (peaked T waves)
-ST-elevation
-|-
-!hours
-| c
-d
-| ST-elevation, with terminal negative T wave
-negative T wave (these can last for months)
-|-
-!days
-| e
-| [[pathological Q waves]]
-|-
-|}
-{{clr}}
 ==The location of the infarct==