valsalva maneuver
Treatment for Cluster Headache
The Valsalva maneuver in cluster headache treatment involves forceful exhalation against a closed airway, which induces a significant increase in intrathoracic pressure and triggers a parasympathetic response. This physiological mechanism can cause vagal stimulation, leading to a sudden decrease in heart rate and increased vagal tone, which may help interrupt or modulate the trigeminal-autonomic reflex responsible for cluster headache pathogenesis.