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Ira J. Isaacson, MD; Arnold J. Berry, MD
Emory University School of Medicine Atlanta

JAMA. 1987;258(9):1171-1172.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

To the Editor.—

With regard to the article entitled "Dipyridamole-Thallium Scanning in Patients Undergoing Vascular Surgery" by Eagle et al,¹ a few comments are offered.

It is unclear what is the value of the authors' validation set. Although this validation was done prospectively, it did not add any further information. In addition, the patients' surgical procedures were different in the two groups. The incidence of significant coronary disease in asymptomatic candidates for abdominal aortic surgery is known to be higher than for carotid or distal ischemic extremity surgery.² A true validation set, if necessary, would have just consisted of patients due for abdominal aortic reconstructive surgery.

The study looked at outcome but treated anesthesia and surgery as a constant. Previous studies have documented that choice of anesthesia and the anesthesiologist may make a significant difference in the outcome of high-risk cardiac procedures.^3,4 These variables were not assessed. . . . [Full Text PDF of this Article]

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