Adjusted aortic root dimension

Maximum SOV Diameter (Aortic Root) Calculator

Sinus of Valsalva (SOV) and Aortic Root Assessment

The sinus of Valsalva diameter (SOVd) is a critical measurement in evaluating aortic root morphology. Age-stratified formulas help determine expected normal values based on body surface area (BSA), aiding in the diagnosis of aortic root dilation.

Key Formulas

  1. BSA Calculation (Mosteller formula):
    [ \text{BSA (m²)} = \sqrt{\frac{\text{Height (cm)} \times \text{Weight (kg)}}{3600}} ]
  2. SOVd Formulas:
  • <20 years: ( \text{SOVd} = 1.02 + 0.98 \times \text{BSA} )
  • 20-39 years: ( \text{SOVd} = 0.97 + 1.12 \times \text{BSA} )
  • ≥40 years: ( \text{SOVd} = 1.92 + 0.74 \times \text{BSA} )

Definition of aortic aneurysm

  • Sinus of Valsalva >45 mm.
  • Any other segment >40 mm in diameter.

Thresholds for surgery

Threshold for surgeryRelevant patient category
27.5 mm/m2Turner syndrome
40 mm• Patients with mutations in TGFBR1, TGFBR2 or Loes-Dietz syndrome, who have low BSA or severe extra aortic features
45 mm• Patients who are undergoing aortic valve surgery
• Patients with Marfan syndrome who have additional risk factors*
• Patients with mutations in TGFBR1, TGFBR2 or Loes-Dietz syndrome.
50 mm• Marfan syndrome
• Bicuspid aortic valve with coarctation or additional risk factors*
55 mm (ascending aorta, aortic arch)All individuals
60 mm (descending aorta)All individuals

*Risk factors: previous dissection, family history of dissection, severe aortic regurgitation or mitral regurgitation, planning pregnancy, uncontrolled hypertension or annual growth >3 mm.

Limitations

  • Formulas assume normal body habitus
  • Ethnic variations may require adjusted thresholds
  • Always correlate with imaging measurements
  • Not valid for pediatric patients <15 years
Updated on 2025-02-02