Overview:  

Centers for Disease Control and Prevention (CDC)

Mayo Clinic
National Heart Lung and Blood Institute (NHLBI)

American Heart Association
World Health Organization (WHO)

Videos:

How Old Is Your Heart? Learn Your Heart Age! 

Why Should I Join a Clinical Trial?

Heart disease risk factors

Organizations:

American Heart Association

National Heart, Lung, and Blood Institute

World Heart Federation

The Heart Foundation

American College of Cardiology

Find A Support Group:

AdventHealth Cardiovascular Institute
Women Heart
Healthtalk

For Caregivers:

American Heart Association