Exercise stress test. American Heart Association. http://www.heart.org/HEARTORG/Conditions/More/CardiacRehab/Exercise-Stress-Test_UCM_307474_Article.jsp#.Vx5lU03mqzk. Updated July 2015. Accessed April 2016.
Exercise stress test. Texas Heart Institute. http://www.texasheart.org/HIC/Topics/Diag/distress.cfm. Updated July 2015. Accessed April 2016.
American College of Cardiology Foundation Appropriate Use Criteria Task Force, American Society of Echocardiography, American Heart Association, et al. ACCF/ASE/AHA/ASNC/HFSA/HRS/SCAI/SCCM/SCCT/SCMR 2011 Appropriate Use Criteria for Echocardiography. J Am Soc Echocardiogr 2011; 24:229.