Prognostic value of exercise stress echocardiography in patients with left bundle branch block.

Background: The literature lacks studies about the prognostic value of exercise stress echocardiography (ESE) in patients with complete left bundle branch block (LBBB) of the bundle of His.

Objective: To assess the prognostic value of ESE in patients with LBBB.

Methods: This is a retrospective cohort that evaluated 135 patients with LBBB, from January 2001 to October 2009, of which 37.