myocardial tagging
MRI technique that creates a grid pattern on the myocardium to track tissue deformation and measure strain throughout the cardiac cycle.
Full Definition
Myocardial tagging is a specialized cardiac MRI technique that applies radiofrequency pulses to create a grid or stripe pattern of saturated magnetization within the myocardium. These tag lines move and deform with the underlying tissue during cardiac contraction and relaxation, allowing for precise quantification of myocardial strain, rotation, and torsion. The technique provides detailed information about regional cardiac mechanics and is considered the gold standard for non-invasive assessment of myocardial deformation. Tag fading over time limits the technique to early to mid-systolic measurements.
Usage
Usage note: Distinguish from feature tracking, which doesn't require specialized tag preparation.
In Context
- "Myocardial tagging revealed abnormal circumferential strain in the anterior wall despite normal wall motion." — Advanced cardiac function assessment
- "The tagging sequence demonstrated preserved radial thickening but reduced longitudinal strain." — Cardiac MRI strain analysis