Heart Disease: Warning Signs: References

US Department of Health and Human Services. National Institutes of Health. National Heart, Lung and Blood Institute. What are the signs and symptoms of heart disease? http://www.nhlbi.nih.gov/health/health-topics/topics/hdw/signs.html. Updated April 21, 2016. Accessed May 2016.

Warning signs of heart attack, stroke, and cardiac arrest. American Heart Association. http://www.americanheart.org/presenter.jhtml?identifier=4595. Accessed May 2016.

Warning signs of a heart attack. American Heart Association. http://www.heart.org/HEARTORG/Conditions/HeartAttack/WarningSignsofaHeartAttack/Warning-Signs-of-a-Heart-Attack_UCM_002039_Article.jsp#.V08kIE0m73d. Updated May 31, 2016. Accessed May 2016.