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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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