Aortic Valve Size

Size

Upper Limits Diameters of the Aorta
Ashley Davidoff

Normal aortic valve
Ashley Davidoff

The normal area of the aortic valve is 3-4cms sq. When there is mild stenosis the mean gradient is 1cms sq. There is moderate stenosis when the gradient is 20-40mmhg, and the area reduced to 1- 1.5mmhg, severe when the SA is <1sqcms and gradient >40mmhg, and critical when the valve area is <.7mmHg and the gradient is 60-80mmHg.
Ashley Davidoff
Image of moderate stenosis courtesy Radiology Key

The Aortic Annulus (red ring) and Aortic Valve
47681 heart cardiac aortic valve aorta right atrium right atrial appendage left atrial appendage LAA RAA pulmonary valve right ventricular outflow tract left atrium LA RA RVOT anatomy normal position relations Ashley Davidoff

Black blood MRI sequence showing normal aortic valve posterior and to the right of the pulmonary outflow tract
Ashley Davidoff

Black blood MRI sequence showing normal aortic valve posterior and to the right of the pulmonary outflow tract with 2 great vessels aligned in an approximately 1o’clock vector
Ashley Davidoff

2D Echo showing left ventricular utflow tract with normal aoertic valves (dark pink) and mitral leaflets (light pink)
Ashley Davidoff

Annulus

- Diameter 20-25 mm
- Surface Area
Valve
- Diameter
  - 3cms
- Area
  - 3-4cms².
  - Stenosis
    - mild
      - >1.5 cms²
      - Agatson Valve score 1066
    - moderate
      - 1.5 – 1.00 cms²
      - Agatson Valve score 2236
    - Severe
      - <1cms² or less critical stenosis
      - aortic jet velocity >≥4.0 m/s
      - mean transvalvular pressure gradient ≥40 mmHg
      - Calcium score 4560
    - Critical
      - <.7 cms²
      - critical stenosis is present and is an indication for surgical replacement. Mild stenosis is present when the gradient is 40mmHg, moderate when less than 60mmHg and severe when the pressure gradient is more than 80mmHg. The valve diameter at slightly more than 3cms is just slightly larger than th main pulmonary artery. The semilunar valves ( aortic and pulmonary) are smaller than the AV valves1
Sino Tubular Junction

Size

Annulus
- Diameter 20-25 mm
- Surface Area
Valve
- Diameter
  - 3cms
- Surface AreaT
  - 3-4cms².
    - Stenosis
      - mild
        
        >1.5 cms²
      - moderate
        
        1.5 – 1.00 cms²
      - Severe
        
        <1cms² or less critical stenosis i
        
        Mild stenosis is present when the gradient is 40mmHg, moderate when less than 60mmHg and severe when the pressure gradient is more than 80mmHg. The valve diameter at slightly more than 3cms is just slightly larger than th main pulmonary artery. The semilunar valves ( aortic and pulmonary) are smaller than the AV valves1
Sino Tubular Junction