1. Preoperative carotid artery screening in elderly patients undergoing cardiac surgery 
Eric S. Berens, MD, Nicholas T. Kouchoukos, MD, Suzan F. Murphy, RN, Thomas H. Wareing, MD 
Journal of Vascular Surgery 
Volume 15, Issue 2, Pages (February 1992)
DOI: / (92)
Copyright © 1992 Society for Vascular Surgery and the North American Chapter, International Society for Cardiovascular Surgery Terms and Conditions

2. Fig. 1
Increased risk for 50% or greater carotid stenosis based on the four independent predictors. Closed squares (■) indicate the presence of the preoperative variable. One hundred fifty-two (82%) of the 185 patients with 50% or greater stenosis had one or two of the predictive variables on presentation. Only 16 patients (8.7%) with this degree of stenosis were not identified by the above risk factors. PVD, Peripheral vascular disease; CVA, cerebral vascular accident.
Journal of Vascular Surgery  , DOI: ( / (92) )
Copyright © 1992 Society for Vascular Surgery and the North American Chapter, International Society for Cardiovascular Surgery Terms and Conditions

3. Fig. 2
Prevalence of 50% or greater carotid artery stenosis according to age.
Journal of Vascular Surgery  , DOI: ( / (92) )
Copyright © 1992 Society for Vascular Surgery and the North American Chapter, International Society for Cardiovascular Surgery Terms and Conditions

4. Fig. 3
Increased risk for 80% or greater carotid stenosis based on the five independent predictors. Closed squares (■) indicate the presence of the preoperative variable. Forty-three (67%) of the 64 patients with 80% or greater stenosis had one or two of the predictive variables on presentation. Only three patients (4.6%) with severe stenosis were not identified by the above risk factors. LMD, Left main coronary disease.
Journal of Vascular Surgery  , DOI: ( / (92) )
Copyright © 1992 Society for Vascular Surgery and the North American Chapter, International Society for Cardiovascular Surgery Terms and Conditions