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Origin of the internal thoracic artery and its relationship to the phrenic nerves

Origine de l'artère thoracique interne. Etude des ses relations avec les nerfs phréniques

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Summary

The internal thoracic artery was studied because of its recent use in the revascularization of the myocardium in patients with coronary artery disease. The artery of 50 cadavers of adult individuals of either sex, whose age ranged from 20 to 84 years, was studied after neoprene latex injection. Its origin, relation to the phrenic nerve and origin of the pericardiacophrenic artery were investigated. The left and right phrenic nerves cross the artery anteriorly in 54% of the cases and posteriorly in 14%. The right nerve crosses the artery anteriorly and the left posteriorly in 22%, and the reverse occurs in 10%. The origin of the internal thoracic artery is much more frequent from the subclavian artery (80%) than from a common trunk with other arteries (20%). The pericardiacophrenic artery is a branch of the internal thoracic artery in 99% of the cases and the average distance between the origins of these two arteries is 3.9±1.3 cm.

Résumé

Nous avons étudié l'a. thoracique interne en raison de l'intérêt qu'elle présente dans la revascularisation du myocarde chez des patients présentant une pathologie coronaire. Les aa. de 54 cadavres adultes des deux sexes, âgés de 20 à 84 ans, ont été étudiées après injection au Néoprène Latex afin de préciser l'origine de cette artère, ses relations avec le n. phrénique et l'origine de l'a. péricardiaco-phrénique. Les nn. phréniques droit et gauche croisent ventralement l'a. dans 54 % des cas. Ils la croisent dorsalement dans 14 % des cas ; le n. phrénique droit croise ventralement l'a., et le n. phrénique gauche la croise dorsalement dans 22 % des cas ; l'inverse survient dans 10 % des cas. L'origine de l'a. thoracique interne se fait plus souvent à partir de l'a. subclavière (80 %) qu'à partir d'un tronc commun avec d'autres aa. (20 %). L'a. péricardiaco-phrénique est une branche de l'a. thoracique interne dans 99 % des cas et la distance moyenne entre l'origine de ces deux aa. est de 3,9±1,3 cm.

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Henriquez-Pino, J., Mandiola-Lagunas, E. & Prates, J. Origin of the internal thoracic artery and its relationship to the phrenic nerves. Surg Radiol Anat 15, 31–34 (1993). https://doi.org/10.1007/BF01629858

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  • DOI: https://doi.org/10.1007/BF01629858

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