Concept ideas for Book Cover. (A thriller called Arrythmia)

This is what a business in Sweden was looking for in their book cover design

I need a book cover for a thriller that will be released this spring.
The title is "Arrythmia" and the maincharacter suffers from a heart problem that becomes the center of the story.
It will be released in swedish so the title to use in the design is "Arytmi"
I´ve attached an image that I used as a temporary cover for it when sending material to publishers (named MyCover), as well as the first try of making an actual book cover from the Publisher (named PublishersCover).

I would like the "heartbeat" to be in the image as it is in my version. Preferably with the "A" in "Arytmi" turned upside down as I have it in my version. This is to symbolize that something is wrong with the heartbeat showing in the image. If you can think of other ways to do it. Feel free to try.

I dont like the fonts used in any of these two images. The font used in myCover is not visible enough and the one used in publishersCover the font feel too much fantasy.
The title and the author name "Fredrik Frängsmyr… Read more