myocardial perfusion imaging
Nuclear medicine technique assessing blood flow to heart muscle using radioactive tracers.
Full Definition
Myocardial perfusion imaging is a nuclear cardiology technique that evaluates regional blood flow to the myocardium using radioactive tracers such as technetium-99m or thallium-201. The study is typically performed at rest and with pharmacologic or exercise stress to detect areas of reduced perfusion indicating coronary artery disease. Single-photon emission computed tomography (SPECT) or positron emission tomography (PET) cameras acquire images that show perfusion defects. This technique provides both diagnostic and prognostic information about coronary artery disease.
Usage
Usage note: Often abbreviated as MPI in clinical contexts, but should be spelled out in formal documentation.
In Context
- "Myocardial perfusion imaging revealed a reversible defect in the inferior wall territory." — Nuclear cardiology report
- "The patient's myocardial perfusion imaging was normal, effectively ruling out significant coronary disease." — Consultation note