Effect of Non-invasive Neurostimulation on Variability OF HEART RATE IN PATIENTS WITH HEART FAILURE.

The patients will perform three sessions of HD-TDCS (stimulation, inhibition and Shan) of twenty minutes with an intensity of three milliamps in the left temporal cortex. Before and after each session, patients will perform the six-minute walk test. Heart rate variability (HRV) will be evaluated throughout the protocol through Holter (3-channel). At the end, the perception of exertion and the level of dyspnea of the patient, distance covered and blood pressure will be evaluated.