TY - JOUR T1 - Pulse-synchronous torsional nystagmus JF - Practical Neurology JO - Pract Neurol SP - 445 LP - 447 DO - 10.1136/practneurol-2021-003027 VL - 21 IS - 5 AU - Ivan Milenkovic AU - Thomas Sycha AU - Evelyn Berger-Sieczkowski AU - Paulus Rommer AU - Christian Czerny AU - Gerald Wiest Y1 - 2021/10/01 UR - http://pn.bmj.com/content/21/5/445.abstract N2 - Purely torsional spontaneous nystagmus almost always has a central vestibular cause. We describe a man with spontaneous pulse-synchronous torsional nystagmus in which the clockwise component corresponded to his pulse upswing, in keeping with a peripheral vestibular cause; following imaging we diagnosed left-sided superior canal dehiscence syndrome. Identifying pulse synchronicity of spontaneous nystagmus may help to distinguish central from peripheral vestibular torsional nystagmus, and is readily confirmed at the bedside using Frenzel’s glasses and a pulse oximeter. ER -