CORRECTION

Incorrect number: In the article by Koplan and Stevenson entitled “Ventricular Tachycardia and Sudden Cardiac Death,” published in the March 2009 issue of Mayo Clinic Proceedings (Mayo Clin Proc. 2009;84(3):289-297), an incorrect number was published in the top box of Figure 2 on page 291. The figure incorrectly recommends 3 shocks (Shock ×3) for hemodynamically unstable ventricular tachycardia/ventricular fibrillation. The most recent 2005 American Heart Association Emergency Cardiovascular Care guidelines recommend a single shock with resumption of cardiopulmonary resuscitation if indicated (Circulation. 2005;112(24):IV-206-IV-211). Therefore, the box in Figure 2 should read as follows: Shock (×1).