Hi
It is NOT serious...
The work of LA (left atrium) is a little harder than usual - because the LV (left ventricle) is thicker than normal from blood pressure. Hence the borderline change...
Slight thickening of
aortic valve happens with age and blood pressure - no problem, as it is
You have nothing to worry at present
Keep the pressure well controlled
Repeat the ECHO after one year
Good luck