LUng and Cardiac Ultrasound for REspiratory Distress in ElDerly

Inclusion Criteria: Eligible patients will be aged over 65 years, affiliated with the French social security system, and presenting to the ED with acute dyspnea (onset \<14 days) accompanied by severity signs before or at triage (respiratory rate ≥22 and SpO2 \<92% on room air). The enrolling emergency physician (EP) must be the patient's treating physician and must be trained in LuCUS. Written informed consent from the patient or their legal representative is required for inclusion Exclusion Criteria: dyspnea secondary to thoracic trauma, dyspnea clearly related to COVID-19, known pulmonary fibrosis or lung cancer, prior administration of specific treatment for dyspnea before inclusion, immediate need for endotracheal intubation, patients identified as being at end-of-life, and individuals under legal guardianship or deprived of liberty.