learn more about the american heart association's efforts to reduce death caused by heart disease and stroke. also learn about cardiovascular conditions, ecc and cpr, donating, heart disease information for healthcare professionals, caregivers, and educators and healthy living.

the source for medical equations, algorithms, scores, and guidelines.

the european society of cardiology (esc) is an independent, nonprofit organisation aiming to reduce the burden of cardiovascular disease.

wolters kluwer is a global provider of professional information, software solutions, and services.

the best science for better lives. explore the latest high-quality research from the lancet group

penn medicine is a world-renowned academic medical center in philadelphia, with hospitals ranked among the nation's top hospitals and #1 in philadelphia by us news & world report.

radiopaedia.org, the peer-reviewed collaborative radiology resource.