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| National Heart, Lung and Blood Institute Health information, research and news in the areas of cardiology, pulmonology and hematology. |   |
| Gross Physiology of the Cardiovascular System Educational article providing an overview of the cardiovascular system. |   | |
| First-Call Medical Cardiac scanning laboratory that provides Holter, cardiac event and pacemaker monitoring. |   | |
| American Heart Association Official site for the American Heart Association. Provides information and resources for the public and professionals related to heart disease prevention. |   | |
| Heart Disease Program Computer system that assists the physician in differential diagnosis and in anticipating the effects of therapy in cardiovascular disorders. |   | |
| eBay: Cardiology Online marketplace for cardiology. |   | |
| 1999 Merck Manual: Cardiovascular Disorders Diagnostic and therapeutic information for cardiovascular disorders. |   | |
| Internal Medical Education General educational information on cardiovascular diseases with an area for physicians and a separate area for patients and family. |   | |
| HeartPoint Patient information on topics related to cardiology, including health tips, news and presentations on a variety of subjects. |   | |
| Chorus: Cardiovascular System Index of articles on a range of cardiovascular conditions. |   | |
| Heart Failure Report Card Resource for healthcare professionals and consumers on the risks, symptoms and treatment, as well as the under treatment of heart failure in the US. |   | |
| eMedicine Health: Heart Attack Consumer health resource center providing an overview of heart attacks and their causes, symptoms, and treatment. |   | |
| Heart Surgery Forum Cardiothoracic multimedia journal featuring news, articles, conferences, technology information and educational resources. |   | |
| Cleveland Clinic Heart Center Provides patient care and conducts scientific research in the area of cardiology. |   | |
| HeartInfo - Heart Information Network Information specifically for physicians and professionals including specialist locator, continuing medical education and other links. |   | |
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