Gerhard sign

Gerhardt's sign is "Gerhard acoustic transformation." In patients with aortic aneurysms, up and down movements of the laryngeal head can be seen when breathing is difficult. Gerhardt's throat sign. When carotid sinus thrombosis is formed, the degree of vascular filling of the ipsilateral external jugular vein is poor. Also known as Gerhardt's jugular vein sign. When aneurysms of the cerebral arteries and spinal arteries are heard, vascular sounds can be heard in the hind head. Also known as Gerhardt's posterior vascular sign.