Do you suffer anxiety from trying to diagnose your medical symptoms based on what you read online? The remedy is staying with a few tried-and-true sites.
Here are a few suggestions:
From the American College of Cardiology: http://www.cardiosmart.org
From The Internet Stroke Center at Washington University: http://www.strokecenter.org
From the Maternal & Child Health Library at Georgetown University: http://www.mchlibrary.info