Here are some links you might find helpful. I just did a search on the National Guildelines Clearinghouse for "Congestive Heart Failure" and picked up the guidelines that seemed they might fit with your subject. However, once on that sight you can also search by any key words that you may feel are more appropriate to your topic. I didn't think to search for "case management". Hope some of the information in these links is helpful for you.
http://www.fpnotebook.com/search.asp?QU=heart+failure&CT=d%3A%5Cusers%5Csmos es%5Cdb - links to information on heart failure and treatment on Family Practice Notebook
http://www.guideline.gov/summary/summary.aspx?doc_id=7664&nbr=004463&string=Congest ive+AND+Heart+AND+Failure - ACC/AHA 2005 guideline update for the diagnosis and management of chronic heart failure in the adult. A report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines
http://www.guideline.gov/summary/summary.aspx?doc_id=5184&nbr=003566&string=Congest ive+AND+Heart+AND+Failure - The pharmacologic management of Chronic Heart Failure from the Veterans Health Administration, Department of Veterans Affairs.
http://www.guideline.gov/summary/summary.aspx?doc_id=3303&nbr=002529&string=Congest ive+AND+Heart+AND+Failure - Heart Failure from American Medical Directors Association
http://www.guideline.gov/summary/summary.aspx?doc_id=5065&nbr=003549&string=Congest ive+AND+Heart+AND+Failure - Chronic heart failure. National Clinical guideline for diagnosis and management in primary and secondary care from the National Collaborating Centre for Chronic Conditions.
http://www.guideline.gov/summary/summary.aspx?doc_id=4036&nbr=003139&string=Congest ive+AND+Heart+AND+Failure - Evidence-based clinical practice guideline. Cardiovascular health for women: primary prevention. From Association of Women's Health, Obstetric and Neonatal Nurses, Cardiovascular health for women: primary prevention. Evidence-based clinical practiced guideline.