Your doctor would be best to address this question, I haven't the faintest clue. One thing though, the EF is the Ejection Fraction. Mine is 65%, I think they usually want it above 45%, and yours is 90%. That's excellent, I'm envious.
Read about it here:
https://en.m.wikipedia.org/wiki/Ejection_fraction
This one uses different terminology than mine. I am going to guess:
EDV = end diastolic volume. 40mL is a lot smaller than my heart, and I have a small heart. I believe this is the volume after filling. It may apply to just the left ventricle. Mine is broken down into left and right.
ESV = end systolic volume. I believe this is the volume after contraction. Same comment.
SV = stroke volume, which is the amount pumped. i.e. SV = EDV - ESV.
Ao, would this be diameter of the aorta?
LA diam, would this be left atrial diameter?
Generally, MV are probably the mitral valve parameters. The remaining values I dont know about. On my echo, the values are given as similar with yours, but I also have most of them expressed as index values with normals listed. The index value, apparently, are adjusted or normalized for estimated body size.
Every heart is different. Some of us have large hearts, some of us have small hearts. Your heart is quite small but its contractility is excellent - I've never even seen an ejection fraction of 90% on any forums, ever. Mine is also in the 60-70% range.
You can ask your doctor if this finding has any significance. Otherwise, your numbers seem pretty normal as far as I know.
An acceleration of heart rate may have nothing to do with the general structure and function of the heart which is the purpose of an echo. Your heart appears to be normal in how it pumps and its size but you may need a different test to capture the fast rate to know what is going on. I would suggest asking for a holter if you have symptoms every day or an event monitor to try and catch what is going on. It could be a number of things causing the fast rate and they would need to see it in action to diagnose. Best of luck and keep us posted.