From the *Division of Cardiology; †Department of Medicine; and ‡Department of Anesthesiology, Vanderbilt University School of Medicine, Nashville, Tennessee.
This article has supplementary material on the Web site:www.anesthesia-analgesia.org.
Accepted for publication August 5, 2008.
None of the authors has a conflict of interest.
Address correspondence and reprint requests to Mias Pretorius, MBChB, MSc, 560 RRB, Vanderbilt University Medical Center, Nashville, TN 37232. Address e-mail to email@example.com.