1. What is Aortic Root Index?

The Aortic Root Index is a normalized measurement that relates aortic root diameter to body surface area (BSA). It provides a more accurate assessment of aortic size by accounting for individual body size differences.

2. How Does the Calculator Work?

The calculator uses the Aortic Root Index formula:

Where:

• \( \text{Aortic Diameter} \) — Diameter of the aortic root measured in centimeters (cm)
• \( \text{BSA} \) — Body Surface Area calculated in square meters (m²)

Explanation: This indexation allows for better comparison of aortic dimensions across patients of different body sizes.

3. Importance of Aortic Root Index

Details: The indexed aortic root diameter is crucial for diagnosing aortic dilation, monitoring patients with connective tissue disorders, and assessing cardiovascular risk in various clinical scenarios.

4. Using the Calculator

Tips: Enter aortic diameter in centimeters and BSA in square meters. Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is the normal range for aortic root index?
A: Normal values typically range from 1.5 to 2.1 cm/m², but reference ranges may vary by age, gender, and imaging modality.

Q2: Why index aortic diameter to BSA?
A: Indexing accounts for body size differences, providing a more accurate assessment of whether the aorta is truly dilated relative to the patient's physique.

Q3: How is aortic diameter measured?
A: Typically measured at the level of the aortic sinuses using echocardiography, CT, or MRI in end-diastole.

Q4: What conditions require aortic root monitoring?
A: Marfan syndrome, bicuspid aortic valve, hypertension, aortic aneurysms, and other connective tissue disorders.

Q5: When is surgical intervention considered?
A: Surgical referral is typically considered when the aortic root index exceeds specific thresholds (usually >2.4-2.7 cm/m²) or shows rapid growth.