In the version of the article, “Common Genetic Variation in KCNH2 Is Associated With QT Interval Duration: The Framingham Heart Study,” by Newton-Cheh et al that was posted online on August 20, 2007 (DOI: 10.1161/CIRCULATIONAHA.107.710780), an error occurred. In the Methods and Results section of the abstract, 2nd-to-last line, the expression “AA/AC, 0.06 SD” should read “AA/AC, 0.12 SD. This error has been corrected in the current online version and in the final print version of the article in the September 4, 2007, issue of the journal (Circulation. 2007;116:1128-1136). The publisher regrets this error.