question about a 12 lead

Hi, I ran a 12 lead on myself at work and saw my qrs complex is a little wide about .135.  I don't see any other signs of a bbb.  My qrs is negative in V1 with a negative T wave.  In I, AVL, v5, V6 my Qrs's are positive and so are my T waves.  My understanding on BBB is V1 is positive with reciprical T waves if it is right and if it is left V1 is negative with positive T waves with negative T waves in the lateral leads.  I am just curious about what it could be.  I am about to have a stress test done (all of our employees a required to at the end of the month) and my doctor says that it looks fine to him, but I am just curious. (and I'm only 24, a little young to be worrying about my heart)

Thanks

[CCF-M.D.-MJM]

Hi Medic58,

Sometimes not knowing is better than knowing -- I am sure you would agree with this now.  It is probably easier to compare a RBBB and LBBBB on ekg than to describe it.  Look at this website for a picture of both types of BBB.  Having a positive T wave in I, AVL, V5-6 is not consistant with a LBBB.  Just out if curiousity, who measured the QRS duration -- it may be the source of error.  sometimes in young people it is easy to make mistakes because of increased voltage in young people and changes in the j point in some young people.

http://www.unm.edu/~lkravitz/EKG/bundlebranch.html

If it doesn't look like either of these and the QRS is wider than 120 milliseconds, we call this an interventricular conduction delay.

If you have a LBBB, a stress test if of no value except to determine your exercise tolerance.  You can not see ischemic changes in the setting of a left BBB.  If you do indeed have one, I would see a cardiologist to evaluate why this is the case.

I hope this helps. I doubt you have anything to worry about.  Good luck and thanks for posting.

[medic58]

I forgot to mention that I am of healthy weight (recently just lost 30 lbs), exercise reguraly, eat a near perfect diet, don't smoke or drink but just seem to have an obsession about my heart which causes some anxiety, which I am working on now.

[WORRIED WOMAN]

CAN SOMEONE PLEASE HELP ME POST A QUESTION TO A DOCTOR