CardioVascular and Interventional Radiology

, Volume 11, Issue 3, pp 146–149

Unusual origin and course of the first septal branch of the left coronary artery: Angiographic recognition


  • Edoardo Verna
    • Division of CardiologyOspedale Multizonale
  • Mauro Santarone
    • Division of CardiologyOspedale Multizonale
  • Mauro Boscarini
    • Division of CardiologyOspedale Multizonale
  • Isabella Ghezzi
    • Division of CardiologyOspedale Multizonale
  • Sergio Repetto
    • Division of CardiologyOspedale Multizonale

DOI: 10.1007/BF02577106

Cite this article as:
Verna, E., Santarone, M., Boscarini, M. et al. Cardiovasc Intervent Radiol (1988) 11: 146. doi:10.1007/BF02577106


The anatomical variants of the origin and course of the first septal branch (S1) of the left coronary artery system have received little attention in the literature dealing with coronary angiography. We describe here the angiographic features of the ectopic origin of S1 from epicardial branches of the left coronary artery other than the left anterior descending artery as observed in 8 cases from a series of 700 consecutive patients (1.1%). The S1 originated from the left main coronary artery in 1 case, from a diagonal branch in 4, and from an intermediate branch in 3 cases. Previous reported cases are reviewed. Because the S1 may supply up to 15% of the blood to the myocardium, the recognition of this variable origin may have clinical implications and has to be considered as a part of the complete evaluation of coronary arteriograms of patients referred for coronary artery revascularization.

Key words

Coronary artery anatomyCoronary arteriographyCoronary artery diseaseCoronary artery surgeryAxial cineagiography

Copyright information

© Springer-Verlag New York Inc 1988