1. What is LV Mass Index?

The LV Mass Index (LVMI) is a measure of left ventricular hypertrophy adjusted for body surface area. It's calculated by dividing the left ventricular mass by the body surface area (BSA). This calculator uses the female-specific formula for accurate assessment.

2. How Does the Calculator Work?

The calculator uses the following equations:

Where:

• \( LVEDD \) — Left ventricular end-diastolic dimension
• \( IVSd \) — Interventricular septal thickness at end-diastole
• \( PWd \) — Posterior wall thickness at end-diastole
• \( BSA \) — Body surface area

Explanation: The equation calculates left ventricular mass from echocardiographic measurements and normalizes it to body size.

3. Importance of LVMI Calculation

Details: LVMI is crucial for diagnosing left ventricular hypertrophy, assessing cardiovascular risk, and monitoring treatment effects in conditions like hypertension.

4. Using the Calculator

Tips: Enter all measurements in centimeters from echocardiography and BSA in square meters. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What are normal LVMI values for females?
A: Normal range is typically 43-95 g/m², with values above 95 indicating left ventricular hypertrophy.

Q2: Why is a female-specific formula used?
A: Women generally have smaller heart dimensions than men, requiring gender-specific calculations for accuracy.

Q3: How is BSA calculated?
A: BSA is typically calculated using the DuBois formula: \( 0.007184 \times weight^{0.425} \times height^{0.725} \).

Q4: What are the limitations of this calculation?
A: Accuracy depends on precise echocardiographic measurements. The formula may be less accurate in very obese or extremely thin patients.

Q5: How often should LVMI be measured?
A: Frequency depends on clinical context, but typically annually in hypertensive patients or those with known LV hypertrophy.