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Medical Term:

thoracic cardiac branches of thoracic ganglia


Definition: part of the cardiopulmonary splanchnic nerves from the second to fifth segments of the thoracic sympathetic trunk that pass medially and anteriorly to enter the cardiac plexus; they convey postsynaptic sympathetic fibers to, and visceral afferent (pain) fibers from, the heart.

Synonym(s): rami cardiaci thoracici gangliorum thoracicorumTA, nervi cardiaci thoracici, thoracic cardiac nerves, upper thoracic splanchnic nerves