Sinus arrest following acute lateral medullary infarction

• Published in: Neurological sciences Vol. 43; no. 11; pp. 6555 - 6559
• Main Authors: Alloush, Taha K., Alloush, Adel T., Sami, Mohammed, Shokri, Hossam M.
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.11.2022; Springer Nature B.V
• Subjects: Ataxia; Bradycardia; Brain stem; Brief Communication; Cardiac arrhythmia; Case reports; Cerebellum; Cerebral infarction; Dysphagia; Heart rate; Hypertension; Ischemia; Medicine; Medicine & Public Health; Medulla oblongata; Neurology; Neuroradiology; Neurosciences; Neurosurgery; Pacemakers; Patients; Psychiatry; Sinuses; Solitary tract nucleus; Stroke; Syncope; Vagus nerve; Veins & arteries; Medullary strokes; Permanent pacemaker placement; Nucleus tractus solitarius; Dorsal vagal nucleus; Autonomic dysregulation–associated clinical manifestations; Posterior inferior cerebellar artery
• ISSN: 1590-1874; 1590-3478; 1590-3478
• DOI: 10.1007/s10072-022-06306-2

Lateral medullary syndrome (LMS) is an ischemic stroke of the medulla oblongata that involves the territory of the posterior inferior cerebellar artery. LMS is often missed as the cause of autonomic dysregulation in patients with recent brain stem stroke. Due to the location of the nucleus tractus solitarius (NTS), the dorsal vagal nucleus, and the nucleus ambiguous in the lateral medulla oblongata, patients with LMS occasionally have autonomic dysregulation–associated clinical manifestations. We report a case of LMS-associated autonomic dysregulation. The case presented by recurrent syncope, requiring permanent pacemaker placement. This case shows the importance of recognizing LMS as a potential cause of life-threatening arrhythmias, heart block, and symptomatic bradycardia. Extended cardiac monitoring should be considered for patients with medullary strokes.