[Total transposition of the great vessels associated to a peculiar preexcitation syndrome].

Following the historical introduction concerning the evolution of our present knowledge of the W-P-W syndrome, we discuss a unique case of complete transposition of the great vessels with an unusual type of pre-excitation. We attributed this excitation to an uncommonly placed bundle of Kent, which, to our knowledge, has not been previously reported as coexisting with the aforementioned congenital heart malformation. A review of the literature, a discussion of other congenital heart diseases associated with disturbances of A-V conduction, as well as the clinical and para-clinical data upon which we base our diagnosis are presented.