tissue Doppler imaging
Also written as: TDI — Tissue Doppler Imaging
Echocardiographic technique measuring myocardial velocities to assess regional and global cardiac function.
Full Definition
Tissue Doppler imaging (TDI) is an ultrasound technique that measures the velocity of myocardial tissue motion rather than blood flow, providing quantitative assessment of regional wall motion and global cardiac function. TDI can be performed using pulsed-wave, continuous-wave, or color Doppler modes to evaluate systolic and diastolic myocardial velocities. The technique is particularly valuable for assessing diastolic function through mitral annular velocities and can detect subtle abnormalities in systolic function not apparent on visual assessment of wall motion.
Usage
Usage note: Specify the measurement location (septal, lateral annulus) and whether systolic or diastolic velocities are being reported.
In Context
- "Tissue Doppler imaging revealed reduced septal e' velocity of 6 cm/s, consistent with diastolic dysfunction." — diastolic function assessment
- "TDI demonstrated reduced systolic velocities in the inferior wall segments." — regional function evaluation