1. What is LV Mass Index?

The LV Mass Index (LVMI) is a measure of left ventricular hypertrophy, calculated by dividing the left ventricular mass by body surface area. It helps assess cardiac remodeling and is an important prognostic factor in cardiovascular diseases.

2. How Does the Calculator Work?

The calculator uses the following formulas:

Where:

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

Explanation: The formula calculates LV mass using linear dimensions from echocardiography, then normalizes it to body size using BSA.

3. Importance of LVMI Calculation

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

4. Using the Calculator

Tips: Enter echocardiographic measurements in cm (LVEDD, IVSd, PWd) and BSA in m². All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What are normal LVMI values for males?
A: Normal range is 49-115 g/m². Values >115 g/m² indicate left ventricular hypertrophy.

Q2: How does this differ for females?
A: Females typically have lower normal ranges (46-95 g/m²) due to smaller body size.

Q3: What imaging modalities can provide these measurements?
A: Echocardiography is most common, but cardiac MRI provides more accurate measurements.

Q4: Are there limitations to this calculation?
A: The formula assumes elliptical LV geometry and may be less accurate in distorted ventricles.

Q5: How often should LVMI be monitored?
A: Depends on clinical context, but typically annually in hypertensive patients or when monitoring therapy.