Atrioventricular blockade (atrioventricular) is a disorder of the conduction of excitation from the atria to the ventricles. Clinical symptoms and electrocardiographic manifestations can be observed with conduction disorders at the level of: atrial tract, in the atrioventricular node, in the trunk, in the bundle of His. According to the classification of V. Doshchitsin, in functional diagnostics, 4 types of atrioventricular blockades are distinguished, respectively, 3 proximal (located at the beginning of the conduction system of the heart, listed first) and one distal (final): atrial, nodal, stem, trifascicular (trifascicular).
What is an atrioventricular node? The atrioventricular node (Ashof-Tavara) is an accumulation of special myocardial cells in the lower part of the right atrium near the interatrial septum. The size of the knot is 3x5 mm. According to the importance of the rank, it represents an automatic center of the second order (following the sinus node) and is designed to take on the role of a pacemaker in case of failure of a higher pacemaker. →
