Evaluation. Participants will be systematically assessed by IC and echocardiography, with a maximum interval of 8 days between them, to obtain the parameters to be used in the validation and concordance studies. To ensure that both tests are performed under similar conditions, evaluations matching variations greater than 10% in BP or variations in excess of 5% in HR will not be considered. These patients should, if possible, repeat one of the exams. If they maintain variations greater than those defined, they should be excluded from the study.