Cardiac fibrosis, responsible for an atrioventricular block. Inert fibrous tissues appear in the cardiac wall ; they are true isulators, that prevent the conduction of cardiac inflow. This fibrosis is primarily due to a decrease or verily a blockage of the electrical conduction between the atria and the ventricles ; the transmission of inflow is no longer made, or badly, between the sinus node (at the top of the right atrium, in yellow) and the atrioventricular node (between the right atrium and the right ventricle). It is the atrioventricular block. The fibrosis is responsible for 50 % of cases of atrioventricular blocks. This image is part of a series concerning anatomy, pathologies and cardiac treatments. See images 2014007 for anatomy, 2012707 et 2012807 for cardiac conduction, 2013007 - 2013107 - 2013507 - 2013607 for cardiac revolution, 2014807 for fibrillation, 2014907 for the atrioventricular block, 2015007 for the flutter, 2015107 for angina and infarction, 2014207 for the defibrillator, 2016107 for the aortocoronary bypass, 2012607 or ablation by radiofrequency.
