Advanced
Technical
IVT
myocardial viability
The presence of living, potentially recoverable myocardial tissue in regions with reduced contractile function.
Full Definition
Myocardial viability refers to the identification of dysfunctional but viable myocardium that has the potential for functional recovery following revascularization. Assessment methods include dobutamine stress echocardiography, cardiac MRI with late gadolinium enhancement, and nuclear imaging techniques such as PET or thallium SPECT. Identifying viable myocardium is crucial for determining whether patients with ischemic cardiomyopathy would benefit from revascularization rather than medical management alone.
Usage
Usage note: Context should clarify whether referring to acute stunning or chronic hibernation.
In Context
- "Cardiac MRI demonstrated myocardial viability in the inferior wall despite severe hypokinesis." — Pre-surgical evaluation report
- "Assessment of myocardial viability is essential before considering surgical revascularization." — Cardiothoracic surgery consultation
Also known as
hibernating myocardium
stunned myocardium
Contrasted with
myocardial scar
non-viable myocardium
Don't confuse with
myocardial perfusion
contractile reserve