MB and rhabdomyolysis: By most definitions, rhabdomyolysis is diagnosed if the CK level exceeds normal higher limits by more than 5 times or its absolute value surpasses 1000 U/L.[6] Myoglobin levels also rose, further supporting the diagnosis of rhabdomyolysis.[7] Only approximately 10% of patients with rhabdomyolysis have the typical triad of acute or subacute myalgia, transient myasthenia, and dark urine.