Test Findings
 

ST Depression

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Overview

    • Look For

    • Depression of the J point (meeting point of QRS complex and ST segment) of >1mm. Note whether the ST segment is horisontal, downsloping or upsloping.
    • ST Depression
       
    • Causes of ST Depression

    • Exercise
    • Cardiac ischaemia without infarction - downsloping ST depression
    • Non-ST elevation MI (NSTEMI)
    • ST elevation MI (STEMI) - reciprocal to ST elevation
    • Hypokalaemia - widespread downsloping ST depression
    • Digoxin - reverse tick ST depression
    • Left ventricular hypertrophy - downsloping
    • Left bundle branch block
    • Example

    • ST depression, T wave flattening and QT prolongation associated with hypokalaemia:
    • ST Depression
       
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