About.com: Common Heart Tests: Offers information about diagnostic procedures used to identify conditions and diseases. Features discussions and links to related articles.
American Heart Association: Diagnostic Tests and Procedures: Features overviews of current detection methods used for diagnosis. Features short articles and links to related publications.
Atlas of Perioperative Echocardiography: An on-line database of over 400 high-resolution still and video echocardiographic images, together with explanatory text and live ‘pubmed’ abstract links. A separate database describes the echocardiographic parameters of over 300 prosthetic heart valves in the mitral and aortic positions.
ECG Library: A collection of electrocardiograms, categorized by condition or abnormality as well as an overview of ECG axis and history.
HeartScan: Information on Electron Beam CT Scanning that can detect coronary artery disease in its earliest, most treatable stages. Provided by Abbott Northwestern Hospital/Minneapolis Heart Institute.
RadiologyInfo: Heart and Vascular System Procedures: Offers information about radiology techniques used for diagnosis and detection. Features images, FAQ's and benefits versus risks.
The Merck Manual: Diagnostic Cardiovascular Procedures: A collection of articles detailing procedures used in the detection of cardiac disease.
TheMDSite.com: Site for physicians offering information on rapid interpretations of EKGs with an interactive learning tool.
Torrance Memorial Medical Center: Information on a variety of cardiological tests and procedures.