ST Segment Elevation to T Wave Height Ratio

Both BER and pericarditis can have ST Segments and T waves that look morphologically similar, making distinguishing between them difficult.

Comparing the height of the ST Segment to that of the T wave can aid in this process.

This can be expressed as a ratio.

The most useful place to measure this is in V6.

When this ratio is greater than 0.25, it indicates the diagnosis of pericarditis is more likely with a positive predictive value of 90% [9].

It can be done in other leads but with less accuracy.

Learning bite

The ST:T wave ratio in V6 of >0.25 makes Pericarditis more likely.