What role does vascular dilation play in the pathogenesis of cluster headache (CH)?

Updated: Jun 07, 2019
  • Author: Michelle Blanda, MD; Chief Editor: Tarakad S Ramachandran, MBBS, MBA, MPH, FAAN, FACP, FAHA, FRCP, FRCPC, FRS, LRCP, MRCP, MRCS  more...
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Answer

Vascular dilatation may play a role in the pathogenesis of CH, but blood flow studies are inconsistent. Extracranial blood flow (hyperthermia and increased temporal artery blood flow) increases, but only after the onset of pain. Vascular change is considered secondary to primary neuronal discharge.


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