Merck Sharp & Dohme Corp.
Merck Manual: Heart Failure
This site from the Merck Manual provides an in-depth article about heart failure provides some basic information about the heart, what exactly heart failure is, the two forms of heart failure, the different causes of both forms, the...
Texas Heart Institute
Texas Heart Institute: Heart Information Center: Cardiac Catheterization
One-page article describing the method of cardiac catheterization used for diagnosing coronary artery disease.
Mayo Clinic
Mayo Clinic: Heart Failure
This site from the MayoClinic.com provides great information on congestive heart failure. The article includes links to topics such as: signs and symptoms, causes, risk factors, screening and diagnosis, complications, treatment and...