Anatomical visualization of neural course and distribution of anterior ascending aortic plexus

Heart and Vessels
Tomokazu Kawashima, Fumi Sato

Abstract

The aim of this study was to document the detailed anatomy of neural course and distribution on the anterior ascending aorta, to identify the high and low density areas of the anterior ascending aortic plexus for further understandings in cardiovascular surgery. The embalmed hearts of 42 elderly individuals were submacroscopically and microscopically examined, after excluding any that were macroscopically abnormal. With its origins in the anterior ascending aortic plexus, the right coronary plexus substantially innervated the right coronary artery, the right atrium and ventricle, and the sinus node. The intensive neural area extending from 10 mm lateral to the interatrial groove below the pericardial reflection as far as the right coronary artery opening contained almost all the right coronary plexus in 61.3% of patients, and more than 40.9% of the total nerve volume of the anterior ascending aortic plexus. Our findings suggest that the most superior and lateral area on the ascending aorta show the lowest neural density of right coronary component in the anterior ascending aortic plexus and the high density areas are invisible in right lateral field of view as seen in the right trans-axillary MICS approach.

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