You don't have to be rude...
> What's the utility of "EKG" [sic] …
What’s the Difference Between ECG and EKG?
The fact of the matter is that an ECG and an EKG are the exact same thing. That’s right, the most surprising difference between an ECG and an EKG is that there is no difference at all. Both ECG and EKG stand for electrocardiogram.
So, if an ECG is the same thing as an EKG, then why are there two different abbreviations? It’s actually quite simple—when the word electrocardiogram is translated into the German language, it is spelled Elektro-kardiographie. EKG is just the way some people choose to say ECG based on this translation.
From http://neurosky.com/2015/05/ecg-vs-ekg-whats-the-difference/