Lv Wall Mass Calculator

LV Mass Formula:

\[ Mass = 0.8 \times 1.04 \times [(IVS + LVID + PWT)^3 - LVID^3] + 0.6 \]

Mass (g):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is LV Wall Mass Calculation?

Left ventricular (LV) mass calculation is a method to estimate the mass of the left ventricle of the heart using echocardiographic measurements. It's an important indicator of cardiac hypertrophy and cardiovascular health.

2. How Does the Calculator Work?

The calculator uses the LV Mass formula:

\[ Mass = 0.8 \times 1.04 \times [(IVS + LVID + PWT)^3 - LVID^3] + 0.6 \]

Where:

\( IVS \) — Interventricular septum thickness (cm)
\( LVID \) — Left ventricular internal diameter (cm)
\( PWT \) — Posterior wall thickness (cm)
\( Mass \) — Left ventricular mass (g)

Explanation: The formula calculates the volume of the left ventricular myocardium and converts it to mass using the specific gravity of heart muscle (1.04 g/mL) and a correction factor.

3. Importance of LV Mass Measurement

Details: LV mass measurement is crucial for diagnosing left ventricular hypertrophy, assessing cardiovascular risk, monitoring treatment effectiveness, and predicting cardiovascular events.

4. Using the Calculator

Tips: Enter IVS, LVID, and PWT measurements in centimeters. All values must be valid positive numbers. Measurements should be taken during diastole from echocardiographic images.

5. Frequently Asked Questions (FAQ)

Q1: What are normal LV mass values?
A: Normal LV mass varies by gender and body size. Generally, values below 95 g/m² for women and 115 g/m² for men (indexed to body surface area) are considered normal.

Q2: When is LV mass measurement indicated?
A: It's indicated for patients with hypertension, valvular heart disease, cardiomyopathies, or when cardiac hypertrophy is suspected.

Q3: How accurate is this calculation method?
A: This echocardiographic method correlates well with MRI measurements (r=0.90-0.95) but may slightly overestimate LV mass compared to gold standard methods.

Q4: What factors affect LV mass?
A: Age, gender, body size, blood pressure, athletic training, and various cardiac conditions can affect LV mass.

Q5: How often should LV mass be measured?
A: Frequency depends on the clinical situation. It may be measured annually in hypertensive patients or more frequently when monitoring response to treatment.