How Stuff Works - Carl Bianco M.D. provides a 6-part graphical in-depth look at heart disease, heart attacks and angina. Topics include atherosclerosis, hypertension, cholesterol, smoking, obesity, diabetes mellitus and stress. Heart Site.com - Explains what a heart attack is, the symptoms, what to do if one is suspected, hospital care, treatments and medication. HeartPoint - Myocardial infarction - Clear patient-oriented information on having a heart attack. Includes an animation of the pathological process and answers to a wide variety of common questions about this type of heart disease. NHS Choices: Heart Attack - Provides information on this medical emergency in which the supply of blood to the heart is suddenly blocked. Includes a short video and details of symptoms, causes, diagnosis, treatment, recovery, complications and prevention. eMedicine Health - Heart Attack - Consumer health resource center providing an overview of heart attacks and their causes, symptoms, and treatment. Mayo Clinic: Heart Attack - An overview of signs and symptoms, causes, risk factors, treatments and other important facts. MedicineNet.com - A look at heart attack (myocardial infarction) and the causes, symptoms, diagnosis, treatment options, recovery and prevention.