Left bundle branch block or lbbb is nerve conduction block to the left half of your heart which is suggestive that the stimulus for contraction is not going directly to the left part it is going through the right and then to the left part.
It is important to rule out any blockage in the blood supply of the left part of the heart causing this problem so you should get yourself a complete cardiac evaluation from a Cardiac Centre.
Whether or not you will need any major surgery
or procedure depends upon your reports
you need to get an 2D echocardiography, repeat your ECG and get back to me with the reports if you need further advice.