Yes, tell her that for a 73 year old, her heart is not bad and good for a few more years.
50-52% ejection phase is normal for a women her age and it means that more than 50 % of her left ventricle blood content i is pumping out blood in one beat.......not bad.
Nothing to concern her or you any concern.
The bradycardia MIGHT be a cause for a little concern as that with the bundle branch block, might suggest that there is some minimal blockage in her coronary arteries, but no big deal.
There is nothing in the above tests to suggest that she is suffering any degree of heart failure which could have been brought on by her hypertension (High B.P)