National Library of Medicine en Español es la división de problemas cardiacos y circulatorios.

http://www.nlm.nih.gov/medlineplus/spanish/pulmonaryembolism.html
http://www.nlm.nih.gov/medlineplus/spanish/thrombophlebitis.html
http://www.nlm.nih.gov/medlineplus/spanish/varicoseveins.html
http://www.cardiothorax.com