This book, consisting of two volumes, contains the Proceedings of the 6th International Workshop on Cardiac Arrythmias held in Venice, Italy at the Fondazione Giorgio Cini, on 5-8 October 1999. Over the four days of the meet ing, practically all aspects of heart rhythm disorders were addressed and dis cussed by internationally renowned experts and by the numerous participants coming from all around the world. Volume 1 - which will be distributed by the international book trade - comprises the contributions of the structured sym posia, while Volume 2 contains those of the satellite symposia....