Introduction: Left vocal cord palsy by Compression of the left recurrent nerve by the left atrium in tight mitral stenosis defines Ortner's cardio-vocal syndrome. The vascular etiology of compression thoracic aortic aneurysm is well described in the literature. Left vocal cord palsy by Compression of the left recurrent nerve by the left atrium in tight mitral stenosis defines Ortner's cardio-vocal syndrome. The vascular etiology of compression thoracic aortic aneurysm is well described in the literature. Case Record: We present the case of an 80-year-old man with a history of thoracic trauma and recent onset dysphonia and simultaneous discovery of an aortic isthmus pseudoaneurysm and left vocal cord paralysis. Discussion: The place of dysphonia during post traumatic false aneurysm of the aortic isthmus is commented. This observation documents the mechanism of compression of the recurrent left nerve by a post-traumatic false aneurysm of the thoracic aorta. Adequate management can improve the patient's prognosis and quality of life.