BLOOD SUPPLY TO THE PARTS OF THE CARDIAC CONDUCTION SYSTEM

要旨

The cardiac conduction system is a specialized complex of cardiomyocytes that generates and conducts electrical impulses that coordinate the rhythmic activity of the myocardium. Adequate blood supply to its structures— the sinoatrial and atrioventricular nodes, the bundle of His, its branches, and the Purkinje fibers —is critical for maintaining normal heart rhythm and preventing conduction disturbances.

The conduction system receives blood primarily from the coronary arteries, with significant anatomical variations associated with the type of coronary circulation (right, left, or balanced). The sinoatrial and atrioventricular nodes most often receive blood from the right coronary artery, while the bundle of His and its branches are predominantly supplied by branches of the left coronary artery, particularly the anterior interventricular artery.

Impaired blood supply to the conduction system caused by ischemia, atherosclerosis, or thrombosis of the coronary arteries can lead to the development of various arrhythmias, including sinus bradycardia, atrioventricular blocks, and intraventricular conduction disturbances. Histological examination of the vascular supply to these structures allows us to identify the morphological basis of these pathological conditions.

This study aims to comprehensively examine the blood supply to various parts of the cardiac conduction system using morphological and histological methods. The findings are of significant importance for clinical cardiology, particularly in the diagnosis and prevention of cardiac arrhythmias.