Bernstein, S. (2015, December 23). Spot Heart Attack, Stroke and Angina Symptoms. Retrieved December 8, 2017, from https://www.webmd.com/heart-disease/features/recognizing-heart-attack-stroke-angina#1
Heart Attack. (n.d.). Retrieved December 8, 2017, from https://www.healthline.com/health/heart-attack
Heart Attacks and Heart Disease. (n.d.). Retrieved December 8, 2017, from https://www.webmd.com/heart-disease/guide/heart-disease-heart-attacks#1
Quinn, C. (2017, August 14). The Long-Term Effects of a Heart Attack on the Cardiovascular System. Retrieved December 8, 2017, from https://www.livestrong.com/article/120720-longterm-effects-heart-attack-cardiovascular/
Silent Heart Attack: Symptoms, Risks. (n.d.). Retrieved December 8, 2017, from https://www.goredforwomen.org/about-heart-disease/facts_about_heart_disease_in_women-sub-category/silent-heart-attack-symptoms-risks/