Americanheart.org is the website for the American Heart Association.
If you are looking to learn more about heart disease, you can do so on the site. The Heart Attack/Stroke Warning Signs section is great for anyone that is worried about their health and wants to know how to prevent heart disease. The Disease & Conditions section will help you learn more about the most common heart conditions and how to spot them before it is too late. The information on this site, when coupled with information from your physician, can be useful in preventing heart disease. Health Care professionals have a section dedicated to them. On this section, they’ll find valuable information on how to improve their patients’ health conditions. For those of us who want a healthier lifestyle, there is the Healthy Lifestyle section. This section has information on how to improve your diet, exercise routines, and other things that will help you improve your lifestyle. 
