I am not sure about nursing-specific organizations but there is a new multidisciplinary group for professionals working in a cardiothoracic surgical critical care setting. Members include intensivists, CT surgeons, PA's, NP's, CCRN's/RN's. Their website is
www.facts-care.org.
There is an annual conference on Cardiothoracic Surgical Critical Care from March 22-24 in Washington, D.C. that is being presented by the above group in cooperation with George Washington University Hospital. NP's from our group are attending. Check out
www.CTScriticalcare.ws for more info.