HIgh Flow Versus NIV for Acute Cardiogenic PuLmonary Oedema With Acute Respiratory Failure in an ED

Inclusion Criteria: * age over or equal 18 years old * admitted in an Emergency Department * acute respiratory failure defined by a respiratory rate over or equal 25 breathes/min or signs of increased work of breathing * clinical suspicion of acute heart failure defined bu the European Cardiologic Society. Exclusion Criteria: * patient requiring immediate invasive mechanical ventilation * neurologic distress defined by a Glasgow Coma Scale under 13 * haemodynamic failure defined by a Mean Blood Pressure under 65 mmHg or patient requiring catecholamines