Vascularization of the conducting system in the human heart

Abstract

On 200 randomized specimens of the human heart, of either sex, from 20 to 80 years of age, we investigated the vascularization of the conducting system of the heart in relation to the type of coronary ramification, by the dissection, injection-corrosive, radiographic and coronarographic method. The symmetrical type of arterial vascularization was established in 24%, the right type in 63% and the left type in 13% of the cases investigated. The sinoatrial node is vas-cularized in 60% by the right and in 40% of the cases by the left coronary artery. The atrio-ventricular node and the stem of the atrioventricular bundle are vascularized by the right coronary artery in 85% of the cases investigated, in 13% by the left and in 2% by both arteries. The right fasciculus of the atrioventricular bundle is vascularized by the left artery, the left fasciculus by both arteries. The vascularization of the posterior strand in both ventricles is conformable to the type of arterial vascularization of the heart.

The Differences in Clinical Characteristic and Outcomes of New Onset Typical versus Atypical Right Branch Bundle Block in Acute Myocardial Infarction

“…The conduction obstacle may occur in the left or right bundle branches, Purkinje fibers, or myocardium. In terms of branch anatomy [ 19 ], the right branch mainly runs in the front 1/3 of the interventricular septum; its main blood supply comes from the anterior descending branch. The left branch also runs in the interventricular septum, but the blood supply of the left branch origins from the anterior descending and posterior descending branches; it has a double blood supply.…”

“…e conduction obstacle may occur in the left or right bundle branches, Purkinje fibers, or myocardium. In terms of branch anatomy [19], the right branch mainly runs in the front 1/3 of the interventricular septum; its main blood supply comes from the anterior descending branch.…”