Tetralogy of Fallot is the most frequent cyanotic congenital heart disease (1/10000 births). The first complete corrections have been done in the fifties, and we now have long-term follow-up studies, revealing the most frequent arrhythmias and anatomic substrates compromising the long-term survival of these patients. The purpose of this article is to review some of the long-term complications of these patients, who, even if they have been completely corrected, will never be cured.