Yes if left bundle: Left bundle branch block is often associated with coronary artery disease and risk of heart attack. This would warrant further investigation with your doctor. Somewhat surprisingly, right bundle branch block is usually benign and not associated with any serious diseases.
Answered 11/28/2013
6.1k views
Maybe: Most of the time a bundle branch block is not linked to any issues especially the right bundle a left bundle has been linked to CAD a work up including an echo and a stress test if waranted.
Answered 6/10/2014
5.5k views
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