Myocardial Performance Index (Tei Index)

Myocardial Performance Index (Tei Index) – An Interesting One

The Tei Index, introduced by Dr. Chuwa Tei, is a Doppler-derived, noninvasive parameter that evaluates global ventricular performance, integrating both systolic and diastolic functions into a single measure.

How It’s Measured:

⬜ Acquired using pulsed and continuous wave Doppler from:

• Mitral inflow (Apical 4-Chamber view)

• Left ventricular outflow (Apical 5-Chamber view)

⬜ Key intervals measured:

a. IVCT – Isovolumetric Contraction Time

b. IVRT – Isovolumetric Relaxation Time

c. ET – Ejection Time

Formula:

👉 Tei Index = (IVCT + IVRT) / ET

👉 Tei Index = (a - b) / b

where:

a = time from mitral valve closure to opening

b = aortic ejection time

Normal Values:

LV Tei Index: ≤ 0.40

RV Tei Index: ≤ 0.43

Interpretation:

🔵 Higher Tei Index → Impaired ventricular function

🔵 Detects early ventricular dysfunction, even when LVEF appears normal

Clinical Significance:

Useful in assessing cardiomyopathies, heart failure, congenital heart disease, and post-transplant monitoring

Applicable in both pediatric and adult cardiology

Comments

Learn Echocardiography | Standard Protocol for Performing Comprehensive Echocardiogram | Explained with Images and Videos

If you are just starting to learn echocardiography, you will find that learning the full echo examination protocol will be immensely useful. The full protocol will provide a solid foundation for your career in echo. I personally found that once I could execute the standard protocol flawlessly, I was able to add and refine additional echo scanning skills while deepening my understanding of the purpose of each echo image. The echo protocol illustrated in this article is the same one we currently use for all our patients in the hospital and meets or exceeds the standards of American Society of Echocardiography (ASE) for an adult echocardiography examination. The protocol presented here is meant as a guideline and does not cover every aspect (such as off axis views) of an echo examination. Also other hospitals will probably have slight variations of this protocol depending on the lab's needs, which is normal. This article's main purpose is to provide a solid foundation for ...

𝘼𝙣𝙩𝙞𝙘𝙤𝙖𝙜𝙪𝙡𝙖𝙩𝙞𝙤𝙣 𝘼𝙛𝙩𝙚𝙧 𝙎𝙩𝙧𝙤𝙠𝙚

𝘼𝙣𝙩𝙞𝙘𝙤𝙖𝙜𝙪𝙡𝙖𝙩𝙞𝙤𝙣 𝘼𝙛𝙩𝙚𝙧 𝙎𝙩𝙧𝙤𝙠𝙚 in Patient with AF and acute IS/TIA European Heart Association Guideline recommends: • 1 days after TIA • 3 days after mild stroke • 6 days after moderate stroke • 12 days after severe stroke Early anticoagulation can decrease a risk of recurrent stroke and embolic events but may increase a risk of secondary hemorrhagic transformation of brain infarcts. The 1-3-6-12-day rule is a known consensus with graded increase in delay of anticoagulation between 1 and 12 days after onset of ischemic stroke or transient ischemic attack(TIA), according to neurological severity based on European expert opinions. However, this rule might be somewhat later than currently used in a real-world practical setting.

What is Duke treadmill Score (DTS) and How to calculate it?

Watch this simple video on DTS calculation with example case: Commonly asked questions: How to Calculate Duke treadmill Score? What is DTS? How to risk stratify a patient with ETT (Exercise Tolerance Test)? #Cardiology #Non-Invasive risk Stratification

Dr. Usman's Cardiology Notes

Search This Blog