Left Ventricle Mass Index: Septal to Septal Time to Maximum Systolic Velocity Ratio (LVMI septal septal TTVmax ratio)
This test measures a ratio of blood flow velocities in the left ventricle of your heart, using ultrasound imaging to assess heart structure and function. It helps evaluate ventricular wall thickness and potential strain or hypertrophy.
["This test may help identify heart conditions affecting ventricular function or structural changes over time."]
Key facts at a glance
- LOINC
- 80047-4
- Short code
- LV.mid sept Time to S Vmax TDI
- Synonyms
- LV.mid sept Time to S Vmax TDI
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 0.8
- Ref high
- 1.2
- Critical range
- — – 5 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- us-tissue-doppler
- CPT
- 85610
- SNOMED
- 396252006
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What This Test Measures
The test uses Doppler echocardiography to measure the time it takes for blood to reach the apex of the left ventricle from the septal wall during systole. The ratio compares septal-to-septal timing of peak systolic velocity, which can reflect myocardial mechanics and potential abnormalities in ventricular function. This is often part of a broader echocardiogram assessment.
Why It’s Performed
Doctors may order this test to evaluate heart muscle health, detect signs of hypertension-related heart changes, or assess for conditions like hypertrophic cardiomyopathy. It can also help monitor progression or response to treatment in patients with known heart conditions.
Sample Preparation
No special preparation is needed for this test. You’ll typically have an ultrasound technician apply gel to your chest and place a probe to capture images of your heart. The procedure is painless and takes about 15–30 minutes.
Common Uses
This test is often used alongside other echocardiogram measurements to diagnose or monitor conditions like aortic stenosis, diastolic dysfunction, or structural heart disease. It may also be part of a comprehensive cardiac evaluation for symptoms such as shortness of breath, chest pain, or fatigue.
Reference range
INR: 0.8-1.2 (warfarin: 2.0-3.0)N/A
Inform your healthcare provider if you are taking blood thinners. No special preparation required.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
LVMI septal septal TTVmax ratio (Echocardiogram-derived)
Frequently asked questions
How long will I need to wait for my results?
What does an abnormal result mean?
Can I eat or drink before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy