Incidental Findings on Cardiac Multidetector Row Computed Tomography Among Healthy Older Adults: Prevalence and Clinical Correlates | Radiology | JAMA Internal Medicine | JAMA Network
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Original Investigation
April 14, 2008

Incidental Findings on Cardiac Multidetector Row Computed Tomography Among Healthy Older Adults: Prevalence and Clinical Correlates

Author Affiliations

Author Affiliations: Departments of Medicine (Drs Burt, Hlatky, and Fortmann), Radiology (Drs Burt and Rubin), and Health Research and Policy (Dr Hlatky), Stanford University School of Medicine, Stanford, California; Division of Research, Kaiser Permanente of Northern California, Oakland (Drs Iribarren and Go); Stanford Prevention Research Center, Stanford University, Stanford (Drs Fair, Mahbouba, and Fortmann and Ms Norton); and Departments of Epidemiology, Biostatistics, and Medicine, University of California, San Francisco (Dr Go).

Arch Intern Med. 2008;168(7):756-761. doi:10.1001/archinte.168.7.756
Abstract

Background  With the widespread use of cardiac multidetector row computed tomography (MDCT), the issue of incidental findings is receiving increasing attention. Our objectives were to evaluate the prevalence of incidental findings discovered during cardiac MDCT scanning and to identify clinical variables associated with incidental findings.

Methods  This cross-sectional analysis involved a population-based sample recruited from an integrated health care delivery system in Northern California as part of the Atherosclerotic Disease, Vascular Function and Genetic Epidemiology (ADVANCE) Study. Healthy men and women aged 60 to 69 years without diagnosed cardiovascular disease underwent cardiac MDCT for the detection and quantification of coronary artery calcification. The images were prospectively evaluated for incidental findings.

Results  A total of 459 participants underwent MDCT scanning, and the overall prevalence of any incidental finding was 41%. Of the 459 participants,105 (23%) had at least 1 incidental finding that was recommended for clinical or radiological follow-up examination, the most common of which was single or multiple pulmonary nodules (18%). Participants with and without incidental findings had comparable baseline demographics and selected clinical variables, although there were significantly fewer men and a significantly lower prevalence of the metabolic syndrome in those with incidental findings.

Conclusions  Incidental findings, especially pulmonary nodules, are common in cardiac MDCT performed to assess coronary artery calcification in older healthy adults. The net risks and benefits of looking for noncardiac abnormalities during cardiac MDCT should be rigorously evaluated.

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