title: Disappearance of right bundle branch block with left anterior hemiblock when associated with a type B pre-excitation syndrome.
mesh_terms: D002037:Bundle-Branch Block / Q000150:complications*; D004562:Electrocardiography; D006327:Heart Block / Q000150:complications*; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008946:Mitral Valve Stenosis / Q000150:complications*; D014927:Wolff-Parkinson-White Syndrome / Q000150:complications*