Atrial Fibrillation
American Heart Association – AFib or AF is a quivering or irregular heartbeat.
https://www.heart.org/en/health-topics/atrial-fibrillation/what-is-atrial-fibrillation-afib-or-af
National Heart, Lung, and Blood Institute – Atrial Fibrillation is one of the most common types of arrhythmias.
https://www.nhlbi.nih.gov/health-topics/atrial-fibrillation
Heart Failure
Mayo Clinic – Heart failure occurs when your heart muscle doesn’t pump blood as well as it should.
https://www.mayoclinic.org/diseases-conditions/heart-failure/symptoms-causes/syc-20373142
Center for Disease Control and Prevention – About 6.5 million adults in the United States have heart failure.
https://www.cdc.gov/heartdisease/heart_failure.htm