What's in a name? A look at the nomenclature of A-V conduction

Correct interpretation of electrocardiographic phenomena should be based upon knowledge of the underlying mechanisms. This requires insight into both the morpholical and electrophysiological basis for impulse formation and conduction. But even with the help of such new techniques as microelectrode recordings, Ris bundie electrography and the intelligent use of eIectrical stimulation of the heart, we are only scratching the surface ofthis problem. In the beginning of 1973 a group of distinguished American colleagues published their nomenclature and concepts on atrioventricular and interventricular conduction [1]; to quote from that article: " as a sort of housekeeping service of an important new area to facilitate fut ure clinical and investigative pursuits and communications". In this issue of the European Journalof Cardiology some prominent European cardiac anatomists and pathologists re ach a communis opinio on structure and nomenclature of the 'normal' atrioventricular junctional area [2] and extra connections leading to premature excitation of certain parts of the heart [3]. The names given are based on anatomical findings with an occasional bow to electrophysiological postulates