myocardial viability
Assessment of whether ischemic myocardium retains the potential for functional recovery after revascularization.
Full Definition
The determination of whether areas of myocardium with reduced function due to chronic ischemia can recover contractile function if blood flow is restored through surgical or percutaneous intervention. Viable myocardium is distinguished from scar tissue through various imaging modalities including PET scanning, MRI, and echocardiography. This assessment is crucial in deciding whether patients with ischemic cardiomyopathy should undergo revascularization procedures. Areas with preserved viability are likely to improve function after CABG, while scarred regions will not benefit from revascularization.
Usage
Usage note: Critical concept for determining revascularization candidacy in heart failure patients.
In Context
- "Dobutamine stress echo demonstrated myocardial viability in the anterior wall." — pre-operative assessment
- "The decision for surgical revascularization was based on extensive myocardial viability." — surgical consultation note