[Complete branch blocks in asymptomatic patients].

Basing themselves on their personal experience and a review of the international literature, the authors study complete bundle branch blocks in asymptomatic subjects. They show that before the age of 50 these complete bundle branch blocks rarely progress towards a complete A-V block. They emphasise the excellent prognosis in the long term for isolated right or left blocks without obvious signs of cardiovascular disease and they cite cases of prolonged survival (20 to 40 years after discovery of the bundle branch block).