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===Atrial infarct=== | ===Atrial infarct=== | ||
In | In approximately 10% of the infractpatients, atrial infarct is suspected. An atrial infarct can manifest itself in atrial rhytmdisturbances: atrial fibrillation / atrial rhythm. Because the atria are hemodynamically of minor importance, the consequences of an atrial infarct are limited (and therfore often missed!). | ||
On the ECG, an atrial infarct manifests by rhythmchanges and/or chnage of the P-Ta segment (sometimes calledPTA (''P'' - ''a''triale ''T'') segment or PR or PQ or PTp (''P'' - ''T'' wave of ''P'' wave) segment)<cite>Abildskov</cite>. This is the part between the P wave and the Q. The ST segment indicates an infarct in the ventricle, the P-Ta segment indicates an infarct in the atria. | |||
Diagnostic criteria for an atrial infarct <cite>Liu</cite>: | |||
* P-Ta | * P-Ta elevation >0.5mm in V5 and V6 with reciprocal depression in V1 and V2 | ||
* P-Ta | * P-Ta elevation >0.5mm in I and depression in II and III | ||
* >1.5mm P-Ta | * >1.5mm P-Ta depression in precordial leads | ||
* >1.2mm P-Ta | * >1.2mm P-Ta depression in I,II or III in combination with atrial arrhytmias | ||
Seceral diagnostic criteria are in use, and this is just an example of one. An important differential diagnosis of PTa segment elevation or depression is pericarditis. | |||
==Infarct diagnosis in LBBB== | ==Infarct diagnosis in LBBB== |