About.com: Heart Disease/Cardiology: Collection of weekly articles about heart and coronary artery diseases and their treatment.
Fight Coronary Disease: Patient-oriented information about coronary disease, to prepare for meeting the physician.
GPnotebook: Chapter covering various aspects of cardiac disease.
Irish Heart Foundation: Patient Information: Provides detailed descriptions of all the major conditions, with links to further information.
MedicineNet - Heart Disease: In depth medical content on disease prevention and treatment.
Principal Health News - Heart Center: News, treatments, prevention tips, special reports and other resources.
WebMD - Heart disease: Information written and reviewed by WebMD doctors.