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Arterial supply of the atrio-ventricular bundle and its right branch by the first diagonal artery: a dual
1Department of Morphological Sciences, Medical School, Autonomous University of Barcelona, Spain.
Insights
A rare septal artery variation supplied key right ventricle structures. This finding highlights potential collateral circulation pathways in anterior interventricular artery stenosis.
Area of Science:
- Cardiovascular Anatomy
- Coronary Artery Anatomy
Background:
- The atrio-ventricular bundle and associated structures require consistent blood supply.
- Variations in coronary artery anatomy can impact cardiac function and surgical planning.
Purpose of the Study:
- To describe a case of an atypical septal artery originating from the first artery.
- To investigate the vascular supply to the atrio-ventricular bundle, its right branch, moderator band, and anterior papillary muscle.
Main Methods:
- Postmortem coronary angiograms were utilized to visualize arterial pathways.
- Microdissection techniques were employed to precisely determine the course of the arteries.
Main Results:
- A septal artery originating from the first artery was found to supply the atrio-ventricular bundle, its right branch, the moderator band, and the anterior papillary muscle.
- The study reviewed various patterns of anterior septal artery origins.
Conclusions:
- This case illustrates an unusual source of blood supply to critical right ventricular components.
- The identified septal artery may serve as an important anastomotic route in cases of anterior interventricular artery stenosis.
Abstract:
A case is described in which a septal artery originating from the first artery contributed to the vascular supply of the atrio-ventricular bundle, its right branch, the moderator band and the anterior papillary muscle of the right ventricle. Postmortem coronary angiograms and microdissection were use to determine the course of the arteries. The different patterns of origin of the anterior septal arteries were reviewed, and the role of these arteries as an anastomotic route in situations of proximal stenosis of the anterior interventricular artery is discussed.