Clinical Research Directory

Inclusion Criteria: * patients seen at medico-psychological emergency cell * patients with an acute stress disorder, diagnosed by DSM-5 * patients who have experienced a potentially traumatic event for the last 3-15 days (vctim or witness) * patients able to read and write in French language * person affiliated or beneficiary of a social security scheme. * person who agrees to participate in the study Exclusion Criteria: * patients with respiratory pathology not allowing cardiac coherence training * patients currently practicing a regular respiratory control technique or within the last 6 months * patients taking beta-blocker, betamimetic, anti-arrhythmic, opioid, antidepressant * patients with a pacemaker or suffering from severe cardiac illness * patients with non-stabilized psychiatric disorder at inclusion * patient taking benzodiazepine unable to wean off in the week following the inclusion * patients with addiction * patients with a cognitive deficit * patients under guardianship or curatorship, under judicial supervision