Aim of this study is to determine the expression of apoptosis and @entity1364 ( @entity1364 ) in the cardiac conduction system in @entity6884 and @entity204 ( @entity204 ) cases. Postnatal morphogenesis of the conducting tissue is an important part of its normal development. In the atrio-ventricular node (AVN) and His bundle (HB) it consists of @entity204 and replacing in an orderly programmed way. However, its nature and its relation to @entity6884 is not yet fully explained. Apoptosis and @entity1364 were investigated in 8 heart conduction systems of @entity1 dying of @entity6884 and in 3 conduction systems of @entity1 dying of @entity204 as controls. The cardiac conduction system was removed in two blocks: the first included the sino-atrial node (SAN) and the crista terminalis, the second contained the atrio-ventricular node (AVN), His bundle (HB), bifurcation, and bundle branches. In the conduction systems as well as in the common myocardium the @entity1364 Labeling Index ( @entity1364 -LI) was found to be negative in all cases. The apoptotic indices (AI) in @entity6884 and in @entity204 were found to have no statistically significant differences (p>0.05). The SAN, in both groups, showed an AI similar to the one detected in common myocardium. In almost all cases, TUNEL labeling was detected in peripheral region of the AVN, close to the @entity955 . The AI was higher in the AVN, HB and the initial tract of bundle branches than in the common myocardium (p<0.05; Student's t test).

Expression of apoptosis and @entity1364 ( @entity1364 ) in the cardiac conduction system of @entity6884 ( XXXX ).

@entity1 :: ('9606', 'Species') :: ['infants'] @entity1364 :: ('5111', 'Gene') :: ['PCNA', 'Proliferating Cell Nuclear Antigen'] @entity955 :: ('MESH:D001281', 'Disease') :: ['atrial myocardium'] @entity6884 :: ('MESH:D013398', 'Disease') :: ['SIDS', 'crib death'] @entity204 :: ('MESH:D003643', 'Disease') :: ['ED', 'explained death', 'degeneration, cell death']
@entity6884 :: (MESH:D013398,Disease) :: ['SIDS']
