stress perfusion MRI
A cardiac MRI technique that assesses myocardial blood flow during pharmacological stress using gadolinium contrast agents.
Full Definition
Stress perfusion MRI is an advanced cardiac imaging technique that evaluates myocardial blood flow and perfusion reserve using pharmacological stress agents (typically adenosine or regadenoson) combined with gadolinium-based contrast agents. The technique involves rapid imaging during first-pass perfusion of contrast material through the myocardium at rest and during peak pharmacological stress. Areas of reduced perfusion appear as dark regions on the images, indicating flow-limiting coronary stenosis or microvascular dysfunction. This non-invasive method offers high spatial resolution and excellent diagnostic accuracy for detecting coronary artery disease, with the additional advantage of comprehensive cardiac assessment including function, viability, and tissue characterization in a single examination.
Usage
Usage note: CMR may be used as alternative abbreviation for cardiac magnetic resonance.
In Context
- "Stress perfusion MRI demonstrated inducible ischemia in the LAD territory with normal resting perfusion." — Cardiac MRI report
- "The patient underwent stress perfusion MRI instead of nuclear imaging due to young age and radiation concerns." — Cardiology consultation note