Determination of Autonomic Responses to Exposure to Electromagnetic Fields With Low Energy Modulated Frequency

Inclusion Criteria: Healthy volunteers: * Should be considered healthy, with no known relevant comorbidity. * Patients should not be suffering from active malignancy or history of malignancy in the past. * Must be over 18 years. * Must have ability to understand and provide a written informed consent. Patients with hepatocellular carcinoma: * Patients must be diagnosed with inoperable HCC. * Presence of primary tumor or metastatic at the time of the procedure. * Patients with liver cirrhosis should be restricted to Child-Pugh A or B. * Patients with AFP\> 400ng/ml and image feature does not require histopathological confirmation. However, in patients with active serology B virus, this value must be greater than AFP 4000 ng / ml. The remaining patients should have histological confirmation of HCC. * Patients may be under observation or treatment in the presence of systemic or intra-hepatic. * Must have ability to understand and provide a written informed consent. Patients with Ductal Carcinoma Breast * Patients must have a diagnosis of breast ductal carcinoma inoperable. * The presence of the primary tumor or metastatic during the procedure. * Patients may be under observation or in the presence of systemic or hormonal treatment only. * Must have ability to understand to provide a written informed consent. Exclusion Criteria: * Can not stop antihypertensive medications or beta-blockers for at least 48 hours or being in possession of a pacemaker or other implantable device. * Pregnant or lactating women. * Smaller than 18 years. * Patients undergoing radiotherapy treatment or up to 2 weeks of discontinuation. * Inability to understand and provide written informed consent. * Liver cirrhosis Child Pugh C. * Patients without a definite diagnosis. * Absence of the primary tumor or metastatic during the procedure.