Lung ultrasound in cardiology: realities and promises

Lung ultrasound is an easily available, reproducible examination tool, both in ambulatory and critically-ill patients, which is used to evaluate congestion status and to differentiate the etiology of dyspnea. In this review, we explain lung ultrasound technique, acquisition protocols and their interpretation, as well as the evidence that shows its effectiveness among stable and critically-ill patients. Lung ultrasound should be used as an add-on to traditional physical examination in order to give an accurate diagnosis and a rapid treatment to patients with pulmonary congestion.