Inclusion Criteria:  • Patients, older than 18 years affected by PAF, ALS and POTS, with dysautonomia symptoms assessed by clinical evaluation and by the Composite Autonomic Scoring Scale (CASS)  Exclusion Criteria:  Hepatic, renal, heart and other secondary causes of autonomic dysfunction History/familiarity with seizures Atrial fibrillation and other relevant cardiac rhythm disturbances Diabetes Other neurological or psychiatric diseases Pacemakers or other electronic implants inserted into the body Coronary disorders, elevated intracranial blood pressure Assumption of drugs facilitating seizures, psychiatric drugs, alcohol abuse