myocardial viability study
Specialized cardiac imaging test to determine if dysfunctional myocardium can recover function after revascularization.
Full Definition
A myocardial viability study is a specialized cardiac imaging examination designed to distinguish viable but hibernating myocardium from irreversibly damaged tissue. These studies use techniques such as dobutamine stress echocardiography, PET imaging with FDG, or cardiac MRI with late gadolinium enhancement to assess tissue viability. The primary goal is to identify patients with ischemic cardiomyopathy who would benefit from revascularization procedures. Viable myocardium demonstrates contractile reserve during dobutamine stimulation, glucose metabolism on PET, or absence of late gadolinium enhancement on MRI, suggesting potential for functional recovery.
In Context
- "The myocardial viability study revealed extensive viable tissue in the anterior wall suitable for revascularization." — Cardiac imaging report
- "PET viability imaging showed minimal viable myocardium, questioning the benefit of surgical intervention." — Pre-surgical assessment