thoracic pain is one of the most frequent reasons for consulting the emergency room. Chest pain can be a sign of different pathologies with a wide range of severity, from life-threatening aortic dissection or myocardial infarction to chest pain during an anxiety attack. Efficient triage of patients is therefore a crucial issue for emergency physicians in order not to ignore an acute coronary event requiring early and specific management.

The investigators seek to evaluate whether a diagnostic strategy based on a thoracic CT scan to rule out coronary calcifications and a single troponin assay can exclude an acute coronary event with sufficient accuracy compared to usual management.

Inclusion criteria:

• Adult patient (≥18 years old)
• Patient admitted to the emergency room of the Nouvel Hôpital Civil in Strasbourg between 06/01/2021 and 12/31/2021 and presenting with typical chest pain <30min or atypical symptoms but non-eliminable cardiac origin.
• Patient with an initial assessment within the norms (ECG not modified, first troponin negative) and having performed a chest CT scan
• Patient who has not expressed his opposition to the reuse of his data for scientific research purposes.

Exclusion criteria:

- Patient who has expressed his opposition to the retrospective reuse of his data for scientific research purposes

Adult patient (≥18 years old) admitted to the emergency room of the Nouvel Hôpital Civil in Strasbourg between 06/01/2021 and 12/31/2021 and presenting with typical chest pain <30min or atypical symptoms but non-eliminable cardiac origin.