Acute heart failure (AHF) is a major public health problem, associated with a 40% risk of death or re-hospitalisation at 3 months. This risk is significantly increased by insufficient decongestion at the end of hospitalisation for AHF assessed by a standardised clinical score, a natriuretic peptide dosage or by cardiac and pulmonary ultrasound . Adapting treatment according to lung congestion assessed by implantable devices (not reimbursed in France) improves the prognosis. However, due to the lack of a standardised congestion assessment, therapeutic adaptation in acute heart failure is currently empirical. The best multimodality approach to congestion evaluation is uncertain.