METHODS. Study Design. This is a validation study of a diagnostic method used in a new context, comparing it with the diagnostic method currently used for this effect in usual clinical practice. Its purpose is to determine the positive predictive value, negative predictive value, sensitivity and specificity of the presence of the D wave, the isovolumetric relaxation time, the systolic time ratio (STR) and thoracic fluid content (TFC) by IC, for the diagnosis of LV diastolic dysfunction (LVDD). To study the relationship between LV geometry, hemodynamic profile, diastolic dysfunction and its degree (confirmed by echocardiography) in hypertensive patients with diastolic dysfunction. We chose to perform a concordance study between IC and echocardiography, the validated , non-invasive test used for the clinical diagnosis of LVDD as well as for the characterization of hypertensive cardiopathy.