What Is a Normal Aortic Valve Index?

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By Monica Bates

The aortic valve is an essential component of the heart that regulates the flow of blood from the left ventricle to the aorta, which then distributes the blood to the rest of the body. The size and functionality of this valve are critical for maintaining optimal cardiovascular health and preventing heart disease.

One way to assess the health of the aortic valve is by measuring its index. In this article, we will explore what a normal aortic valve index is and why it matters.

What Is Aortic Valve Index?

The aortic valve index (AVI) is a measurement that helps determine the size of the aortic valve in relation to an individual’s body surface area (BSA). BSA takes into account height and weight, which makes it more accurate than just measuring valve size alone.

AVI is calculated by dividing the area of the aortic valve opening by BSA. The resulting number provides insight into whether an individual’s aortic valve size is within normal limits.

How Is Aortic Valve Index Measured?

There are several methods for measuring AVI, but one common technique involves using echocardiography. This non-invasive imaging test uses high-frequency sound waves to create pictures of the heart’s structures, including the aortic valve. During an echocardiogram, healthcare professionals can measure various dimensions of the valve opening and calculate AVI based on those measurements.

What Is Considered Normal Aortic Valve Index?

The normal range for AVI varies depending on factors such as age, sex, and body size. In general, an AVI between 0.6-1 cm²/m² is considered normal for adults with no significant cardiac conditions. However, some studies suggest that older adults may have slightly larger valves due to age-related changes in their hearts.

Why Does Aortic Valve Index Matter?

AVI is an essential measurement because it provides insight into the size and function of the aortic valve. An abnormally large or small valve can affect blood flow, leading to various cardiovascular complications.

For example, an enlarged aortic valve may be indicative of conditions such as aortic stenosis, which occurs when the valve narrows and restricts blood flow. In contrast, a small valve may increase the risk of regurgitation, which happens when blood flows back into the left ventricle instead of moving forward into the aorta.


In summary, the aortic valve index is an important measurement that helps determine whether an individual’s aortic valve size is within normal limits. A normal AVI range is between 0.6-1 cm²/m², but this can vary depending on factors such as age and body size. Measuring AVI through echocardiography can provide valuable insight into an individual’s cardiovascular health and help diagnose potential heart conditions early on.