well for a start it is your data - so you can demand it as a right ( Data Protection )
but you can't demand an explanation ( that is you can demand the data only but not the significance )
misprint for LAHB - left anterior hemi-block
If you get the ECG - then the first three I, II and III are designed to go Up up up and in your case go up down down - = LAD
LAHB is where if you look at some of the V - leads instead of a mountain peak is W shaped.
No sig abormality is the erm significant comment
[ mine said rate 135 uncontrolled atrial fibrillation consistent with ischaemic heart disease ]
dont worry
If you want to read a book about it Schamroth is still good - in its sixth edition I think