Longitudinal Observational Study for mIddle Term Follow-up Patients Admitted for Acute Dyspnea in TunIsia

Inclusion Criteria: * Patients admitted for unexpected respiratory difficulty * Patient admitted to the emergency department * One of the following 3 criteria have to be present at admission to the ER: * O2 \< or = 95% * Respiratory rate RR \> or = 20 * Suffocation sensation Exclusion Criteria: * Patients \<18 years old and\> 85 years' old * Pregnancy * History of allergic asthma at early age * Diagnosis retained of pulmonary embolism * Patients with heart failure (HF) with left ventricular ejection fraction LVEF \<40% are known beforehand or discovered at admission to ER * known Allergy for Polyamide; Polyester; Elastane; Silicone; Silver; Synthetic material Cardiorespiratory disorders which may be aggravated by the slight compression of the thorax Open wound on the skin, at the level of the trunk