Chicago, Illinois lms communication deals with the anatomic factors that may be related to
the production of evanescent or permanent atrioventricular (AV) block. These anatomic
factors will be gleaned from (1) the basic histology of the approaches to the atrioventricular
(AV) node, the atrioventricular node, bundle and bundle branches,(2) the relations of these
structures to surrounding tissues, and (3) the blood supply of these structures. Previous
reviews have dealt with the general pathology of these structures leading to atrioventricular …