[Cardiac resynchronisation].

A fifth of patients with heart failure suffer from conduction disorders. A prolonged QRS duration on the electrocardiogram is an indicator of cardiac dyssynchrony. Several studies have shown the efficacy of cardiac resynchronisation therapy (CRT) in patients with a wide QRS duration: CRT is associated with reduced morbidity and mortality. An overview of the methods of implantation of CRT devices, the results of this electrical treatment and its limits.