Heart Disease and Stroke Statistics 2017 At-a Glance. American Heart Association website. https://healthmetrics.heart.org/wp-content/uploads/2017/06/Heart-Disease-and-Stroke-Statistics-2017-ucm_491265.pdf Published June 22, 2017. Accessed March 15, 2018.
Mozzafarian D, Benjamin EJ, Go AS, et al. on behalf of the American Heart Association Statistics Committee and Stroke Statistics Subcommittee. Heart disease and stroke statistics—2016 update: a report from the American Heart Association. Circulation. 2016;133:e38-e360.
Kligfield, Gettes, et al. Recommendations for the Standardization and Interpretation of the Electrocardiogram. Circulation (AHA). 2007; 115:1306-1324; originally published online February 23, 2007.