eMedicine: Hyperkalemia 
Clinical article by David Garth, MD explains this condition. Includes blood level ranges, causes, common lab tests, and treatment.
http://www.emedicine.com/emerg/topic261.htmeMedicine: Hyperkalemia 
Eleanor Lederer, MD discusses why potassium is essential to life. Includes three mechanisms that increase serum blood levels, risk factors, common symptoms, and medical care.
http://www.emedicine.com/med/topic1082.htm
Hyperkalemia 
Defines what this condition is, how it occurs, diagnosis, treatment, prognosis, and prevention.
http://www.healthatoz.com/healthatoz/Atoz/ency/hyperkalemia.jsp
Hyperkalemia 
Describes the signs and symptoms of this condition, causes, treatment options; drug, complementary, and alternative therapies; and special considerations.
http://www.umm.edu/altmed/ConsConditions/Hyperkalemiacc.html
Hyperkalemia 
Details the disorders and agents that can cause this condition, methods for diagnosis, and medications used in treatment.
http://www.aafp.org/afp/20060115/283.html
Hyperkalemia 
Wikipedia article explains what constitutes high potassium levels, signs and symptoms, causes, diagostic methods, and treatment.
http://en.wikipedia.org/wiki/Hyperkalemia
MedicineNet: Hyperkalemia 
Explains what it is, how it effects the body, what causes it, how it diagnosed, and what treatments are used.
http://www.medicinenet.com/hyperkalemia/article.htm
Hyperkalemia 
Brief Mayo Clinic article explains what it is, the causes, and possible effects on the body.
http://www.mayoclinic.com/health/hyperkalemia/HQ00843
NORD: Hyperkalemia 
Abstract discusses what this condition is, how is occurs, and why it can be dangerous.
http://www.rarediseases.org/search/rdbdetail_abstract.html?disname=Hyperkalemia
Potassium: Hyperkalemia 
Find information on this disorder of high potassium, its causes, incidence and risk factors.
http://www.nlm.nih.gov/medlineplus/ency/article/001179.htm