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

The aim of the study reported by Berendes et al¹ was to protect the heart against perioperative stress during coronary artery grafting by temporary high thoracic epidural anesthesia. Surgical sympathetic denervation of the heart by resection of the preaortic plexus was suggested by Arnulf² in 1939 in an effort to improve the clinical status of patients with angina and coronary artery disease.

We at the Research Centre of Cardiovascular Diseases in the Institute for Clinical and Experimental Medicine (Prague, Czech Republic) tested the effect of resection of the preaortic and subaortic plexuses in 20 patients undergoing coronary artery bypass grafting in a bid to determine whether the procedure would improve the perioperative and postoperative courses. Twenty patients were enrolled in the control group.³

The simultaneous measurement of phasic blood flow in the coronary artery bypass with the blood pressure in the aortic root was performed before and after resection of . . . [Full Text of this Article]

Milan Vrána, MD, PhDr; Zdenka Vránová, PhDr

Correspondence: Dr Vrána, Praha Publishing, Anglická 17, 120 00 Prague, Czech Republic (vrana@prahapublishing.cz).