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Assessment of myocardial infarctions using multidetector-row computed tomography
Konstantin Nikolaou1, Andreas Knez, Sonja Sagmeister
1Department of Clinical Radiology, University of Munich, Munich, Germany. Konstantin.Nikolaou@ikra.med.uni-muenchen.de
Journal of Computer Assisted Tomography
|April 20, 2004
Summary
Multidetector-row computed tomography (MDCT) accurately detects myocardial infarctions, assessing their age and size without extra scans. This imaging technique offers high sensitivity and specificity for diagnosing heart attacks.
Area of Science:
- Cardiology
- Radiology
- Medical Imaging
Background:
- Myocardial infarction (MI) diagnosis relies on various imaging modalities.
- Assessing MI presence, age, and size is crucial for patient management.
- Multidetector-row computed tomography (MDCT) is a widely used coronary angiography technique.
Purpose of the Study:
- To evaluate the diagnostic performance of contrast-enhanced MDCT for MI detection.
- To assess MDCT's ability to determine MI age and size.
- To compare MDCT findings with left heart catheterization and contrast ventriculography.
Main Methods:
- 106 patients underwent standard MDCT coronary angiography.
- MDCT images were analyzed for MI presence, age, and size by blinded reviewers.
- Infarct areas were identified by reduced contrast uptake or wall thinning.
- CT density (Hounsfield units) and infarct volumes were measured.
Main Results:
- MDCT detected 23 of 27 MIs (85% sensitivity, 91% specificity, 90% accuracy).
- Infarcted myocardium showed significantly lower CT density (54 HU) than non-infarcted (117 HU).
- MDCT differentiated between recent and chronic MIs.
- Recent infarct volume correlated negatively with ejection fraction (r = -0.72).
Conclusions:
- Standard MDCT coronary angiography can identify infarcted myocardium with moderate to high sensitivity.
- MDCT accurately localizes infarcts compared to cineventriculography.
- Infarct age and volume can be estimated using MDCT without additional procedures.