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Will LBBB progress to complete heart block?

April 2011 routine physical ECG was normal.  April 2012 routine physical ECG showed PRWP and inverted T waves - Transesophageal echocardiogram done all OK.  July 2012 checked ECG again, now LBBB - another echo (all OK) and Nuclear stress test perfusion, etc., all OK.  No symptoms, 41 year old woman. PMH: IBS brother died of heart attack aged 36. Will LBBB progress and get worse? Develop total block? Do I need a pacemaker?  

submitted Paula from San Ramon on 8/7/2012


by Texas Heart Institute cardiologist, Jorge F. Guttin, MD    

Jorge F. Guttin, MDLBBB [left bundle branch block] does not necessarily progress to complete heart block. Everything else being normal, you should lead a normal lifestyle, and continue medical follow and coronary risk control.

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Updated August 2012
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