ST Depression
April 24th, 2019
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.
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:
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