cardiac (nerve) plexus

car·di·ac (nerve) plex·us

[TA]
a wide-meshed network formed by anastomosing cardiopulmonary and splanchnic nerves conveying afferent and autonomic nerve fibers (sympathetic and parasympathetic), surrounding the arch of the aorta, the pulmonary artery, and continuing to the atria, ventricles, and coronary vessels.
Synonym(s): plexus (nervosus) cardiacus [TA]