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RSNA 2004 > Assessment of Cardiovascular Risk Status at CT Colonography ...
 
Scientific Posters
  CODE: 1552VI-p
  SESSION: Vascular Interventional (Noninvasive Vascular Imaging)
  Assessment of Cardiovascular Risk Status at CT Colonography

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PARTICIPANTS
Presenter
Jesse Davila MD
Abstract Co-Author
Charles Johnson MD
Thomas Behrenbeck MD
Tanya Hoskin
- Author stated no financial disclosure

- Disclosure information unavailable
SUBSPECIALTY CONTENT
Vascular and/or Interventional Radiology
 
  DATE: Wednesday, December 01 2004
  START TIME: 12:45 PM
  END TIME: 12:55 PM
  LOCATION: Hall D1, Lakeside Center

 PURPOSE
 
CT Colonography (CTC) has the potential to detect important extracolonic abnormalities. Since cardiovascular related deaths account for the most common cause of death in the United States, we sought to determine if findings encountered during a routine CTC examination could be used to assess cardiovascular risk and future cardiac events. Our aim was to determine if calcium scores of the abdominal aorta obtained during CTC relate to Framingham risk factors and clinical cardiac events.
  
 METHOD AND MATERIALS
 
Between 1995-1998, 480 patients underwent CTC, 467 were available for assessment. Calcium scoring (Smart Score, GE Medical Systems), using a threshold of > 150 HU was recorded for the abdominal aorta (suprarenal, infrarenal, bifurcation, total). Patient histories were abstracted for established cardiac risk factors and cardiac events.
  
 RESULTS
 
Nine patients had cardiac events subsequent to CTC. A proportional hazards regression showed significant association between MI or cardiac related death and aortic bifurcation calcium scores exceeding 895, the 75th percentile for this calcium variable, p < 0.01. All four calcium scores showed significant associations with established cardiac risk factors. Spearman rank correlations between total calcium score and the variables age, pack years smoking, and systolic blood pressure were 0.51, 0.43, and 0.29, respectively (p < 0.0001).
  
 CONCLUSION
 
Aortic calcification scores at CTC are significantly associated with established cardiac risk factors and cardiac related events. This screening information can be obtained without additional scanning or risk to the patient. The potential impact of combining colorectal screening with cost-effective cardiovascular screening is substantial and merits further study.
  
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