Aortic Height Index (AHI) Calculator

Calculate AHI



Formula

To calculate the Aortic Height Index (AHI):

\[ AHI = \frac{\text{Aortic Height}}{\text{BSA}} \]

Where:

What is an Aortic Height Index?

The Aortic Height Index (AHI) is a measurement used in medical imaging to assess the size of the aorta in relation to the patient’s body size. It is calculated by dividing the maximum height of the aorta by the patient’s body surface area (BSA). This index is particularly useful in identifying abnormalities such as aneurysms or dissections in the aorta, as it provides a more accurate assessment of aortic size than absolute measurements, which do not take into account variations in body size.

Example Calculation 1

Let's assume the following values:

Using the formula:

\[ AHI = \frac{30}{1.8} = 16.67 \text{ cm/m}^2 \]

The Aortic Height Index is 16.67 cm/m\(^2\).

Example Calculation 2

Let's assume the following values:

Using the formula:

\[ AHI = \frac{35}{2.0} = 17.50 \text{ cm/m}^2 \]

The Aortic Height Index is 17.50 cm/m\(^2\).