@keranki Our litmus test for making changes or adding new notes is “is this information necessary for me to get a question right?” That way it benefits all users. For the purposes of the MCAT, it is usually systole & diastole along with the valves that are open/closed for each that is tested. I will close this suggestion for now, but if you find practice material that does ask for your suggestion’s content, please share it or the source from which you found it (UWorld, Kaplan, etc)