[Ventricular resynchronization in the treatment of heart failure].

Despite the major advances in medical drug therapy, heart failure remains a syndrome with high mortality and morbidity. Biventricular pacing is being tested in congestive heart failure patients with left bundle branch block of an advanced degree. The aim is to resynchronize the dyscoordinate left ventricle contraction. A number of studies are underway, but it is clear that while some patients respond remarkably, this method in highly variable. Accurate identification of patients likely to benefit will be crucial.