WebMD
Web Md: Heart Attack Treatments
In WebMD's entry on heart attacks, there is a section on treatments and diagnosis. Read about the various things that can be done to improve your health and decrease your risk of having a heart attack.
WebMD
Medicine Net: Heart Attack
This site from MedicineNet.com provides great information on a myocardial infarction, otherwise known as a heart attack. Includes a definition and description, along with information on causes, symptoms, diagnosis, and treatment options
American Heart Association
American Heart Association: Conditions: Heart Attack: Symptoms and Diagnosis
Read a general overview of heart attacks and heart pain, including angina. Content includes information on the difference between stable and unstable angina, and the symptoms of a heart attack.