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15 May 1998 | Volume 128 Issue 10 | Pages 839-847
Purpose: To briefly review the role of calcium in the pathophysiology of atherosclerosis and to comprehensively review and analyze studies of coronary artery calcium detected by electron-beam computed tomography (CT).
Data Sources: The English-language literature located through MEDLINE and Current Contents.
Study Selection: All studies of electron-beam CT in symptomatic and asymptomatic patients with and without known coronary artery disease were selected.
Data Extraction: Significant findings on the association of cardiac risk factors and angiographically evident coronary artery disease with coronary artery calcium detected on electron-beam CT were compared. Prospective data on clinical outcomes in patients with coronary artery calcium were assessed.
Data Synthesis: Coronary artery calcium is common in patients with known coronary artery disease or risk factors for coronary artery disease, and it becomes more common with increasing age. Coronary artery calcium detected by electron-beam CT is a sensitive but not a specific indicator of angiographically evident atherosclerosis; sensitivity is increased and specificity is decreased for angiographically significant disease. Test characteristics can be adjusted to improve specificity at the cost of sensitivity. Very limited data suggest that patients with coronary artery calcium are more likely to have cardiac events.
Conclusions: Electron-beam CT is a promising new tool for the evaluation of coronary artery disease because patients who have coronary artery calcium are likely to have angiographically evident atherosclerosis. However, too few data currently exist to support the broad use of this tool in clinical decision making during the evaluation of patients with known or suspected coronary artery disease.
Author and Article Information
From the Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania. For the current author address, see end of text.
REVIEW
Electron-Beam Computed Tomography, Coronary Artery Calcium, and Evaluation of Patients with Coronary Artery Disease
Requests for Reprints: Anthony S. Fiorino, MD, PhD, Department of Dermatology, 2 Rhoads Pavilion, Hospital of the University of Pennsylvania, Philadelphia, PA 19104; e-mail: fiorino@alum.mit.edu.
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