Advanced Cardiac Imaging Glossary
100 terms total — 24 showing — Last updated 15 Sep 2026
microvascular obstruction MVO
No-reflow phenomenon in capillary beds following reperfusion, appearing as dark zones within areas of late gadolinium enhancement on cardiac MRI.
PET
An advanced nuclear imaging technique using positron-emitting tracers to assess myocardial perfusion, metabolism, and vi...
phase-contrast MRI
Specialized MRI technique that measures blood flow velocity and volume by detecting phase shifts in moving protons.
phase-velocity encoding
A cardiac MRI parameter that determines flow sensitivity in phase-contrast sequences, requiring precise technical specif...
post-contrast T1
T1 relaxation time measurement obtained after gadolinium administration, used to calculate extracellular volume fraction...
PSIR
Phase-sensitive inversion recovery sequence that optimizes contrast between normal myocardium and scar tissue in cardiac...
radial strain
Myocardial deformation measurement representing thickening and thinning of the heart wall in the radial direction during...
regadenoson stress test
Pharmacological stress test using selective A2A adenosine receptor agonist for cardiac perfusion imaging with fewer side...
regurgitant volume
Quantitative measure of the amount of blood flowing backward through an incompetent cardiac valve during each cardiac cy...
RWMA
Regional wall motion abnormality, describing impaired contraction in specific myocardial segments during cardiac imaging...
SAPPHIRE-HF
A clinical trial designation that editors frequently encounter in cardiac device imaging research papers and regulatory...
septal bounce
An abnormal pattern of interventricular septal motion characterized by early diastolic leftward movement toward the left...
SPECT
A nuclear imaging technique that uses gamma rays to create three-dimensional images of myocardial perfusion and function...
SSFP
Steady-state free precession MRI sequence providing high contrast between blood and myocardium, commonly used for cardia...
STIR sequence
Short tau inversion recovery MRI sequence that suppresses fat signal to enhance visualization of edema and inflammation...
strain imaging
Advanced echocardiographic technique measuring myocardial deformation to detect subtle contractile abnormalities.
stress-redistribution protocol
Nuclear imaging sequence using thallium-201 to assess both perfusion and viability in a single study.
T1 mapping
Quantitative MRI technique that measures native T1 relaxation times to detect diffuse myocardial fibrosis and infiltrati...
T2 mapping
Quantitative MRI technique measuring tissue T2 relaxation times to detect myocardial edema and inflammation.
TAPSE
Tricuspid annular plane systolic excursion; echocardiographic measurement of right ventricular longitudinal function.
TIMI flow grade
Standardized classification system for assessing coronary blood flow during angiography.
tissue Doppler imaging
Ultrasound technique measuring myocardial tissue velocities to assess regional cardiac function and timing of mechanical...
TR velocity
The peak velocity of blood flow across the tricuspid valve, used to estimate pulmonary artery systolic pressure.
transmural infarction
Myocardial infarction extending through the full thickness of the ventricular wall. Associated with Q-wave formation and...
ventricular concordance
The normal relationship between the morphological and functional characteristics of the right and left ventricles in con...