title: Ventricular gradient in left bundle branch block.
mesh_terms: D000368:Aged; D002037:Bundle-Branch Block / Q000503:physiopathology*; D004562:Electrocardiography; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies