You guys should just ask directly what the numbers mean before posting a wall of text that has nothing to do with the numbers.
The 7.2 to 5.2 is the size of my heart. An average heart is 5 mine is just slightly above that but no longer enlarged to 7.2. Not sure if it's centimeters or inches but I would guess inches.
If you had not noticed, one of my habits has been to post walls of text, and to elaborate on topics in which I am interested.. to the extent that I remain interested in such topic.
When measurements are made of the heart, they may describe the measurements in terms of what a "normal" heart for a person your size should look like, but they also go by your previous measurements (if they have any), so there will be overall size of the heart and then size of the various partitions in the heart, size of the chambers, thickness of the heart walls, and surely some of the measures will be deemed more important than others depending on what your situation had been.. including that you could have overall enlargement of the heart or you could have merely just had a lopsided enlargement, and sometimes it is quite difficult for the heart to stop enlarging once it starts.. and it could be that yours was enlarging due to injury.. or that it was not able to take stress due to some kind of other things going on in your body... or yeah maybe a genetic predisposition, so we could hypothesize about all kinds of possibilities that do not necessarily take us away from the kinds of heart-related issues that someone could have and what someone might study into those conditions if s/he had such a condition or knows someone close to him/her who has a similar condition.
I understand when you are posting about your own condition, then there can be a lot of issues related to how much you choose to disclose, but then some cans of worms could be opened up, and you could decide that you don't want to discuss some things, too... It seems to me that even though health care providers will attempt to figure out some of your measurements as compared to what they would consider a "normal" measurement of someone of your size, that does not always answer the question since one of the most important measurements would be to measure where your heart was at one stage when it was normal as compared to another stage when it was not, and surely one of the disadvantages that any medical provider might have would to not have good comparisons, because they likely did not measure your heart in any kind of specifically accurate ways while it was normal, but instead started measuring after the problem had already been detected, so they might not be able to see a before and an after in the most ideal way, so therefore they are attempting to compare to what normal should have been for you prior to your having issues, so then later down the road, it seems that they are measuring various states of your heart after it had already been detected to have abnormal happenings (such as the enlarging).. but still even if they do not have ideal measurements, they are still trained to attempt to see what they believe to be progress by comparing two states of what had been enlargement that is lessening...