strain imaging
Advanced echocardiographic technique measuring myocardial deformation to detect subtle contractile abnormalities.
Full Definition
Strain imaging, also known as speckle-tracking echocardiography, is a quantitative technique that measures myocardial deformation during the cardiac cycle. It provides objective assessment of regional and global left ventricular function by tracking acoustic markers (speckles) in the myocardium throughout systole and diastole. Global longitudinal strain (GLS) is particularly valuable for early detection of subclinical left ventricular dysfunction in conditions such as chemotherapy-induced cardiotoxicity, where ejection fraction may remain normal despite impaired myocardial function.
Usage
Usage note: Report strain values as negative numbers (e.g., -18%) with normal GLS typically < -18%.
In Context
- "Global longitudinal strain was reduced at -16%, indicating subclinical left ventricular dysfunction." — Cardio-oncology report
- "Strain imaging revealed regional impairment in the anterior wall despite normal wall motion on visual assessment." — Echocardiography report