1. What is Aortic Valve Volume?

Aortic valve volume is calculated by multiplying the aortic valve area (AVA) by the velocity time integral (VTI). This measurement helps assess the hemodynamic significance of aortic valve disease.

2. How Does the Calculator Work?

The calculator uses the simple equation:

Where:

• \( AVA \) — Aortic valve area in cm²
• \( VTI \) — Velocity time integral in cm

Explanation: This calculation provides the stroke volume across the aortic valve, which is useful in evaluating valve function and cardiac output.

3. Importance of Aortic Valve Volume

Details: Aortic valve volume measurement is crucial for assessing the severity of aortic stenosis or regurgitation, and for monitoring disease progression.

4. Using the Calculator

Tips: Enter AVA in cm² (typically obtained from echocardiography) and VTI in cm (from Doppler measurements). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a normal aortic valve volume?
A: Normal values vary but typically range between 70-100 cm³ in adults, depending on body size and cardiac output.

Q2: How does this relate to stroke volume?
A: In the absence of significant regurgitation, aortic valve volume equals left ventricular stroke volume.

Q3: When is this calculation most useful?
A: Particularly valuable in assessing low-flow, low-gradient aortic stenosis and in quantifying regurgitant volumes.

Q4: Are there limitations to this calculation?
A: Accuracy depends on precise measurement of AVA and VTI. Errors in either measurement will affect the volume calculation.

Q5: How often should this be measured?
A: Frequency depends on clinical context, typically repeated with follow-up echocardiograms in patients with valve disease.