In recent studies, pulmonary congestion which is expressed in the form of B-lines detected by lung ultrasound (LUS) has proven to be a potent prognostic predictor of hospitalization and mortality in HF. Moreover, the use of LUS is becoming more common due to its availability (with pocket devices with sizes approaching those of smart phones); its simplicity (rapid learning curve and rapid examination, less than 5 minutes) and its safety (radiation free).