All about heart rate (pulse). American Heart Association. https://www.heart.org/en/health-topics/high-blood-pressure/the-facts-about-high-blood-pressure/all-about-heart-rate-pulse. Accessed Dec. 16, 2021.
Target heart rate and estimated maximum heart rate. Centers for Disease Control and Prevention. https://www.cdc.gov/physicalactivity/basics/measuring/heartrate.htm. Accessed Dec. 16, 2021.
Roberts JR, et al., eds. Vital signs measurement. In: Roberts and Hedges' Clinical Procedures in Emergency Medicine and Acute Care. 7th ed. Elsevier; 2019. https://www.clinicalkey.com. Accessed Dec. 16, 2021.
Bradycardia. American College of Cardiology. https://www.cardiosmart.org/topics/bradycardia/treatment. Accessed Jan. 6, 2022.