title: [Do the guidelines always show us the ideal treatment of patients for cardiac resynchronisation therapy?].
abstract: We present a case of 80-year-old man with chronic atrial fibrillation and heart failure with mildly depressed left ventricular  ejection fraction who deteriorated after implantation of pacemaker to right ventricular apex. The patient improved when  pacemaker was upgraded to resynchronisation therapy (CRT). The question is raised if CRT should have been implanted  primarily.
authors.affiliation: Klinika Kardiologii i Chorób Wewnętrznych, Wojskowy Instytut Medyczny, Warszawa. zbigniew.orski@wp.pl
authors.forename: Zbigniew
authors.initials: Z
authors.lastname: Orski
authors.forename: Dariusz
authors.initials: D
authors.lastname: Michałkiewicz
authors.forename: Krystian
authors.initials: K
authors.lastname: Krzyżanowski
authors.forename: Karol
authors.initials: K
authors.lastname: Makowski
authors.forename: Robert
authors.initials: R
authors.lastname: Ryczek
mesh_terms: D000369:Aged, 80 and over; D001281:Atrial Fibrillation / Q000150:complications / Q000628:therapy*; D058406:Cardiac Resynchronization Therapy / Q000592:standards*; D002908:Chronic Disease; D006333:Heart Failure / Q000150:complications / Q000628:therapy*; D006801:Humans; D008297:Male; D010138:Pacemaker, Artificial; D017410:Practice Guidelines as Topic; D017211:Treatment Failure