ABSTRACT INSIDENCE OF POST OPERATIVE SHIVERING AT ARIFIN ACHMAD HOSPITAL IN RIAU PROVINCE By Suci Indah Sa’diah Shivering is a traumatic event experienced by postoperative patients. Shivering were defined as fasciculations of the face, jaw, head or muscle hyperactivity, whereas postoperative shivering/post anesthetic shivering (PAS) was involuntary and oscillatory muscle activity during …