strain imaging
An advanced echocardiographic technique that measures myocardial deformation to assess cardiac function.
Full Definition
Strain imaging, also known as speckle tracking echocardiography, is a sophisticated technique that quantifies myocardial deformation by tracking acoustic speckles within the myocardium throughout the cardiac cycle. This method provides objective assessment of cardiac function beyond traditional visual wall motion analysis and ejection fraction measurements. Strain can be measured in longitudinal, radial, and circumferential directions, with global longitudinal strain being the most clinically validated parameter. The technique is particularly sensitive for detecting subclinical cardiac dysfunction in conditions such as chemotherapy cardiotoxicity, hypertrophic cardiomyopathy, and early heart failure with preserved ejection fraction.
Usage
Usage note: Distinguish from strain rate (temporal derivative) and stress imaging (provocative testing).
In Context
- "Strain imaging revealed reduced global longitudinal strain despite normal ejection fraction." — Advanced echocardiography report
- "Regional strain analysis showed impaired deformation in the LAD territory." — Ischemia assessment report