Complete atrioventricular block can occur, among others, in case of hyperkalemia, that is a life-threatening complication of rhabdomyolysis. Statins constitute the medication group that is especially associated with a possibility of muscle complications. Frequency of statin-associated myalgia is 5-10%, and potentially fatal rhabdomyolysis--0.02-0.09%. We describe a male patient who was admitted due to syncope caused by complete atrioventricular block. Iatrogenic rhabdomyolysis with life-threatening hyperkalemia, that was related to statin, was diagnosed. After application of suitable pharmacotherapy, conduction abnormalities resolved. The patient was discharged in a good condition.