Violation of intraventricular conductivity

The conductivity of nervous excitement — one of the unique functions of the heart. It provides a consistent transfer of momentum from the main node to the Atria and ventricles. In the interventricular septum are special cells that are connected in the branches. Name of the discoverer, they are called beams or legs bundle branch block.

Graduating in the bottom part of both ventricles and the apex of the heart to form a fine network of Purkinje fibers.

• myocardial infarction of the anterior or lateral walls;
• focal cardiosclerosis;
• hypertension;
• nezareatmene interatrial septum;
• aortic defects;
• insufficiency of the valves the mitral valve;
• myocarditis;
• hypertrophic cardiomyopathy;
• of myocardiodystrophy with metabolic changes.

How is the blockade left rear branch

The mechanism of conduction disorders of impulse is inhibited in zadanija of the left ventricle. Arousal goes on the left front harness to the anterolateral region myocardium, Purkinje fibers extend in rear and lower portions. The myocardium is activated by the front wall from the top down.

This kind of unit is rarely isolated, often occurs in conjunction with blockade of the right bundle branch block.

Causes focal changes in the left ventricle from the posterior wall at:

• zadnelateralnuu myocardial infarction;
• cardiosclerosis;
• myocarditis;
• the cardiomyopathy;
• calcinate idiopathic conduction system.

Especially the blockade of the right leg with the left hind branch

The mechanism of conduction disorders: left undamaged anterior branch of the excitation is delivered to the front and side walls of the left ventricle, then the anastomoses covers its rear and lower parts. Last but not least the impulses reach the right ventricle.

The reasons are not different from the above described widespread and deep lesions of the left ventricular wall. ECG-signs combine the changes of the chest lead with the blockade of the right leg with right deviation of the electrical axis.

Trehochkovye blockade

The mechanism of conduction disorders: when incomplete electrical impulse to the Atria to the ventricles on one of the branches (less than impressed). When it detects signs of atrioventricular block. A complete blockade is characterized by third-degree atrioventricular obstruction and changed the source of the ventricular rhythm.

Causes — severe organic lesions of the myocardium has already been listed above.