title: Intermittent narrow and wide QRS complexes in a 46-year-old man.
authors.affiliation: Cardiovascular Institute, Maastricht, The Netherlands.
authors.forename: Hein J
authors.initials: HJ
authors.lastname: Wellens
authors.affiliation: Cardiovascular Institute, Maastricht, The Netherlands,; Beth Israel Deaconess Medical Center, Boston, Massachusetts. Electronic address: mjoseph2@bidmc.harvard.edu.
authors.forename: Mark E
authors.initials: ME
authors.lastname: Josephson
mesh_terms: D001145:Arrhythmias, Cardiac / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology*; D004562:Electrocardiography; D006801:Humans; D008297:Male; D008875:Middle Aged; D050177:Overweight / Q000150:complications* / Q000503:physiopathology