This document lists various cardiovascular organizations and websites that provide guidelines and resources related to cardiology. Some key organizations mentioned include the European Society of Cardiology, American Heart Association, American Association of Cardiovascular and Pulmonary Rehabilitation, and American Society of Echocardiography. Additionally, several websites are listed that offer guideline summaries and general cardiovascular guideline information, such as the National Guideline Clearing House, Medscape Cardiology, and articles from publications like "Medscape" and "US Pharmacist".