I assume you didn't do a DIY test, ask your doctor.
The only thing I can directly react to is an EF of 55%, that is okay. It could be better, mine is 60% and I am an old guy who has undergone heart surgery and suffer from AFib. Still, 55% is fine I believe.
I know when I get a test and ask for the report I find things that look worrisome to me - yet I get a telephone call form my cardiologist saying something like "no change" (where no change is wanted/expected), or all loks fine. Still, if I am troubled, I call back and talk to the doctor, who is always good enough to call m back. I can't say I always like the answer, but I get one anyway. Last example was my echocardiogram had a note on the test report: "Moderate tricuspid regurgitation with marked right atrial enlargement." Doesn't sound good to me, but my cardiologist says it is not viewed as a problem. Still, I wonder why the test MD said "marked enlargement" if it was of no significance. Seems like I made an argument against asking my doctor - still I will take his appraisal. I am not worrying about it, I can say that.
I could be off, but it It sounds like the examiner of the test results must state what he appears to see, but then adds that the soft tissue overlying the heart could have messed with the signal.
"There is a mild persistent defect at the left ventricular apex which is consistent with either soft tissue attenuation artifact or apical thinning."
IOW, "I see something, it could be real, but it could be just an artifact from the layer of breast tissue on top of were I'm trying to see and it's messing things up."