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Variations of the blood supply of the human conus arteriosus
C A Baptista1, L J Didio, G Teofilovski-Parapid
1Department of Medicine and Anatomy, Medical College of Ohio, Toledo 43699 0008.
Insights
This study details the blood supply to the conus arteriosus in human hearts. The sternocostal wall is primarily supplied by branches of the right and left coronary arteries, not solely the arteria coni arteriosi.
Area of Science:
- Cardiovascular Anatomy
- Cardiac Surgery
- Medical Education
Background:
- The conus arteriosus is a critical component of the right ventricular outflow tract.
- Understanding its blood supply is essential for cardiac surgeons and anatomists.
Purpose of the Study:
- To investigate and detail the specific arterial sources supplying the sternocostal wall of the conus arteriosus in human hearts.
- To identify the most prevalent coronary artery branches involved in its vascularization.
Main Methods:
- Dissection and analysis of 80 human hearts.
- Division of the conus arteriosus into right and left halves, each further sectioned into superior, middle, and inferior portions.
- Identification and documentation of blood supply origins.
Main Results:
- The sternocostal wall of the conus arteriosus receives blood supply from the arteria coni arteriosi, but more commonly from right and left coronary artery branches.
- The most frequent supplying branches identified were: ramus anterior ventriculi dextri medialis and lateralis (85%), ramus coni arteriosi dexter (51.2%), and others with significant prevalence.
Conclusions:
- The vascularization pattern of the conus arteriosus is complex and predominantly involves branches of the main coronary arteries.
- Detailed anatomical knowledge of these supply routes is crucial for surgical interventions and understanding congenital anomalies.
Abstract:
The conus arteriosus was divided into right and left halves and each half was subdivided into 3 portions: superior, middle and inferior. The study of the blood supply of the conus was performed in 8O human hearts. The results showed that the sternocostal wall of the conus arteriosus may be supplied by the arteria coni arteriosi but, more frequently by branches of the right and left coronary arteries. The most frequent branches supplying the conus arteriosus were the ramus anterior ventriculi dextri medialis and lateralis (85%), ramus coni arteriosi dexter (51.2%), ramus anterior ventriculi dextri medius I (47.5%), ramus anterior ventriculi dextri intermedius (41.2%), ramus coni arteriosi sinister (40%) and ramus anterior ventriculi dextri superior I (38.7%).