Aortic root

The aortic root is the first part of the aorta and connects the heart to the systemic circulation. 

The aortic root lies between the junction of the aortic valve and ascending aorta. It has several subparts 1:

  • three aortic valve leaflets and leaflet attachments
  • three aortic sinuses of Valsalva: intraluminal space formed by the cusps
    • right and left contain coronary aorta ostia, with a third non-coronary aortic sinus located posteriorly
  • three interleaflet trigones: space between the cusps and the annulus
  • sinotubular junction, which divides the aortic root from the ascending aorta

All the components of the aortic root coordinate their functions to produce an effect that manages coronary perfusion and left ventricular function and specific flow characteristics 1

The average aortic diameter at the sinuses of Valsalva is often taken as 3.0 cm ± 0.5 4.

Anatomy: Thoracic

Anatomy: Thoracic

Article information

rID: 35267
System: Vascular, Cardiac
Section: Anatomy
Synonyms or Alternate Spellings:

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Cases and figures

  • Figure 1: sectional cardiac anatomy (creative commons illustration)
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  • Case 1: aortic root dilatation in Marfan syndrome
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