: Left Ventricular Myocardial Infarction Time to Maximum TDI (Tissue Doppler Imaging)
: This is a specialized echocardiographic measurement that uses tissue Doppler imaging (TDI) to assess the timing of left ventricular events following a myocardial infarction. It is a research- and specialist-oriented parameter rather than a routine blood test.
[": This descriptor reflects an advanced cardiac imaging timing measurement, not a standard laboratory analyte, so interpretation depends on the specific echocardiography protocol used."]
Key facts at a glance
- LOINC
- 80044-1
- Short code
- LV.mid inf Time to S Vmax TDI
- Synonyms
- LV.mid inf Time to S Vmax TDI
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- us-tissue-doppler
- 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 slug describes a time interval ("time to max") related to left ventricular ("lvmi") function measured by tissue Doppler imaging ("tdi") after a myocardial infarction ("inf"). TDI is an ultrasound-based technique that records the velocity of heart muscle motion rather than blood flow.
: Why Timing Matters
: In tissue Doppler studies, the timing of peak myocardial velocities can provide information about how the heart muscle contracts and relaxes. Researchers have examined such timing parameters to understand cardiac mechanics after a heart attack.
: How the Measurement Is Obtained
: The measurement is acquired during an echocardiogram using tissue Doppler settings, then analyzed to determine when the maximum velocity occurs relative to the cardiac cycle. It is not performed on blood, serum, or plasma.
: Limits of This Description
: Because the compressed slug combines imaging and timing terms that are not standard LOINC laboratory fields, the exact protocol, units, and reference values cannot be reliably determined from the slug alone. A specific numeric range should not be assumed.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
: Clinical significance of this parameter is context-dependent and primarily associated with specialized cardiac imaging assessment of left ventricular mechanics after myocardial infarction; it is not a routine diagnostic laboratory test, and results must be interpreted alongside the full echocardiographic study and clinical picture.
Short name
: NONE
Frequently asked questions
: Is this a blood test?
: Can I get a numeric reference range from this description?
: Who might use this kind of measurement?
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