There are three major ones, plus more!
- ST depression
- Flattened T waves
- Abnormally prominent U waves
The way to remember this is that, in line with the subpar nature of hypokalaemia, everything is weak and low!
ST depression is a depression, so it is low.
The T waves have low amplitude, so they too are low.
The dip of the letter U, as in U waves, looks like the minimum point of a parabola, so it’s also low.
Conveniently, it all follows an alphabetical pattern: ST, T, U.
- ECG Learning Center. (n.d.). 12. Nice Seeing “U” Again. [online] Available at: https://ecg.utah.edu/lesson/12 [Accessed 4 Jul. 2018].
- Burns, E. (n.d.). Hypokalaemia. [online] LITFL. Available at: https://lifeinthefastlane.com/ecg-library/basics/hypokalaemia/ [Accessed 4 Jul. 2018].