Definition of ST Elevation

The European Society of Cardiology defines the height of ST elevation in AMI as being measured at the J point [4] (click on the image to enlarge).

One study demonstrated how measuring the height of the ST segment is highly variable between junior doctors spreading up to 5mm beyond the J point [5].

This suggests that the process of measuring ST segment elevation is open to observer variability even before a provisional diagnosis is made.

Learning bite

Measuring ST Segment elevation needs to occur at the J point.