myocardial perfusion imaging
Also written as: MPI — myocardial perfusion imaging
Nuclear cardiology technique that evaluates blood flow to heart muscle using radioactive tracers.
Full Definition
Myocardial perfusion imaging (MPI) is a nuclear cardiology procedure that assesses regional myocardial blood flow using radioactive tracers such as technetium-99m or thallium-201. The technique involves imaging the heart at rest and during pharmacological or exercise stress to detect areas of reduced perfusion indicating coronary artery disease. In cardiovascular research, MPI serves as a non-invasive method for detecting ischemia, assessing treatment response, and risk stratification. Single-photon emission computed tomography (SPECT) and positron emission tomography (PET) are the primary imaging modalities used for myocardial perfusion assessment.
Usage
Usage note: Specify the imaging modality (SPECT or PET) and tracer used when describing methodology.
In Context
- "Myocardial perfusion imaging revealed reversible perfusion defects in the anterior wall." — Diagnostic test results
- "The primary endpoint was improvement in myocardial perfusion imaging defect size at 6 months." — Efficacy endpoint