Until now the autonomic dysfunction in Diabetes Mellitus type 2 (DM2)has been broadly studied in long term patients. Thus, clinical features as cardiac autonomic neuropathy (CAN) and the lack of the baroreceptor reflex were widely described in patients with a long standing Diabetes. However, there hasn´t been a description of the initial autonomic imbalance in both Pre-Diabetes and recently diagnosed DM2 patients. This is the goal of the present research study, to assess the autonomic dysfunction among these sets of patients.