In the editorial, “Type 5 Phosphodiesterase Inhibition: The Focus Shifts to the Heart,” by Marc J. Semigran, which appeared in the October 25, 2005, issue of Circulation (Circulation. 2005;112:2589–2591), the name of the first author of the paper to which the editorial refers was misspelled repeatedly. In the editorial, the name appeared as “Bourlaug”; however, the correct spelling is “Borlaug.” We regret this error. In addition to this correction, please note that a revised version of the editorial has been posted online. The version of the article originally published on October 25, 2005, is available at the “Previous Version of This Article” link for reference purposes.