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Updated: Aug 19, 2026
In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography
Published on: February 16, 2016
Myocardial salvage in patients with non-ST-elevation myocardial infarction determined by myocardial perfusion imaging
Michael C Kontos1, Karen A Kurdziel, Joseph P Ornato
1Department of Department of Internal Medicine, Cardiology Division, Virginia Commonwealth University, Richmond, Virginia, USA. mkontos@hsc.vcu.edu
Insights
Myocardial perfusion imaging using technetium-99m isotopes revealed significant myocardial salvage in most non-ST-elevation myocardial infarction patients. This salvage was linked to improved ejection fraction, indicating potential for better heart function recovery.
Area of Science:
- Cardiology
- Nuclear Medicine
- Diagnostic Imaging
Background:
- Non-ST-elevation myocardial infarction (NSTEMI) is a common cardiac emergency.
- Assessing myocardial viability and predicting recovery is crucial for NSTEMI management.
- Myocardial perfusion imaging (MPI) is a key diagnostic tool.
Purpose of the Study:
- To compare acute and late MPI using technetium-99m isotopes in NSTEMI patients.
- To evaluate the extent of ischemic risk area and myocardial salvage.
- To determine the association between myocardial salvage and left ventricular ejection fraction.
Main Methods:
- Prospective study involving 69 NSTEMI patients.
- Acute and late MPI performed using technetium-99m labeled tracers.
- Quantification of ischemic risk area and myocardial salvage.
- Assessment of left ventricular ejection fraction.
Main Results:
- The ischemic risk area was substantial, averaging 19% of the left ventricle.
- Significant myocardial salvage (>25% decrease in risk area) was observed in 67% of patients.
- Myocardial salvage was positively correlated with an improved ejection fraction.
Conclusions:
- Acute and late MPI with technetium-99m isotopes effectively identifies myocardial salvage in NSTEMI.
- A significant proportion of NSTEMI patients experience myocardial salvage, suggesting reversibility.
- Myocardial salvage is associated with better left ventricular function, highlighting its prognostic importance.
Abstract:
We compared acute and late myocardial perfusion imaging using technetium-99m isotopes in 69 patients who had non-ST-elevation myocardial infarction. Among these patients, we found that the ischemic risk area was often large (19% of the left ventricle), and that 67% had significant myocardial salvage, defined as a >25% decrease in risk area, which was associated with an improved ejection fraction.
