American College of Cardiology
Membership information, educational materials, and clinical standards and guidelines.

American Heart Association
Information on emergency cardiac care training for professionals and resources for consumers.

Lipids Online Educational Resources in Atherosclerosis
Research and CME courses on both pediatric and adult cardiac topics related to lipid abnormalities.

National Marfan Foundation
Overview of symptoms and management.

Williams Syndrome
Information for health professionals and families about symptoms and management.