As a result of the ageing population and improved medical care causing people to survive previously fatal conditions (eg, myocardial infarction), heart failure occurs more and more ofen in the elderly population. Despite intensive medical therapy, people with heart failure ofen have a reduced quality of life and poor prognosis — a large proportion of people die within one year of diagnosis. Cardiac resynchronisation therapy (CRT) by means of biventricular pacing is a fairly new procedure that improves patient quality of life (based on the Minnesota Living with Heart Failure Quality of Life Questionnaire), increases distance walked in six minutes, improves oxygen uptake, lowers New York Heart Association classification, decreases QRS duration, increases left ventricular ejection fraction, and increases peak oxygen consumption.