(Kessler, Lischke) Consultant, Center of Anesthesiology and Resuscitation.
(Hecker) Associate Professor, Department of Cardiovascular Physiology, Center of Physiology.
Received from the Center of Anesthesiology and Resuscitation and the Center of Physiology, Johann Wolfgang Goethe University Clinic, Frankfurt am Main, Germany. Submitted for publication November 1, 1995. Accepted for publication February 6, 1996. Supported by Deutsche Forschungsgemeinschaft grant He 1587/5–1.
Address reprint requests to Dr. Hecker: Center of Physiology and Pathophysiology, University of Gottingen, Humboldtallee 23, 37073 Gottingen, Germany.