"An impulse-conducting system composed of modified cardiac muscle and having the power of spontaneous rhythmicity and conduction more highly developed than the rest of the heart"
(http://medical.webends.com/kw/Heart Conduction System)

--------------------------------------------------
Note added at 2004-02-19 00:31:23 (GMT)
--------------------------------------------------

\"Bodźce te w warunkach fizjologicznych powstająw węźle zatokowym, który wraz z węzłem przedsionkowo-komorowym i drogami przewodzącymi tworzą układ bodźcoprzewodzący serca.\"
(www.biotronik.com/ Heart Conduction System
\"Heart Conduction System. The sinoatrial node (SAN), located within the wall of the right atrium (RA), normally generates electrical impulses that are carried by special conducting tissue to the atrioventricular node (AVN)....\"
(http://your-doctor.com/healthinfocenter/medical-conditions/c...