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Anatomy of Main Coronary Artery Location: Radial Position around the Aortic Root Circumference

Zakaria Almuwaqqat1, Maryann Tranquilli, John Elefteriades

  • 1Section of Cardiac Surgery, Yale University School of Medicine, New Haven, Connecticut.

The International Journal of Angiology : Official Publication of the International College of Angiology, Inc
|September 3, 2013
PubMed

Insights

The average angular separation between the right and left coronary ostia in humans is 122.9 degrees. This key coronary artery anatomy differs significantly from porcine aortic roots used in aortic root replacement surgery.

Area of Science:

  • Cardiovascular Anatomy
  • Surgical Anatomy
  • Medical Imaging

Background:

  • Accurate radial positioning of coronary ostia is crucial for composite graft operations during aortic root replacement.
  • Existing knowledge gaps regarding coronary ostial angulation can lead to critical intraoperative orientation errors and patient ischemia.

Purpose of the Study:

  • To precisely quantify the radial and angular relationship of the native right and left coronary ostia in humans.
  • To compare human coronary ostial anatomy with that of commonly used porcine aortic roots in aortic root replacement.

Main Methods:

  • High-definition computed tomography (CT) scans were utilized to assess coronary ostial location in 100 patients (75 aneurysm, 25 control).
  • Geometric calculations determined the angular separation between the center points of the right and left coronary ostia relative to the aortic lumen center.

Main Results:

  • The mean angular separation between the right and left coronary ostia was 122.9 degrees, with low individual variation (SD 13.1 degrees).
  • This angle was consistent across aneurysm and control groups, and between bicuspid and tri-leaflet aortic valves.
  • A significant difference was observed compared to the 145-degree angulation typically found in porcine aortic roots.

Conclusions:

  • The normal human angular separation of coronary ostia is approximately 122.9 degrees, a critical anatomical landmark for aortic root surgery.
  • This human anatomy differs substantially from porcine aortic roots, necessitating intraoperative awareness and informing the design of novel composite grafts.

Keywords:
Medtronic FreeStyleaortic root replacementcoronary anglecoronary reimplantation

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