Inclusion Criteria  - Adult patients (> 18 years old) with diagnosis of idiopathic peripheral neuropathy  Exclusion criteria  Patients with alternative established diagnosis of heart disease (ischemic heart disease, primary valvular heart disease, cardiomyopathies, pericardial disease) Patients with end stage renal disease undergoing dialysis Patients with other medical conditions recognized to impair the 1-year prognosis of patients