Cluster headache: orbital hemodynamic changes during Valsalva maneuver.

@article{Barriga2006ClusterHO,
  title={Cluster headache: orbital hemodynamic changes during Valsalva maneuver.},
  author={Francisco Javier Barriga and Mar{\'i}a L. Cuadrado and Angel Bueno and Manuel Gonz{\'a}lez Bar{\'o}n and Jos{\'e} Luis Dobato and Lydia Caba Vela and Juan Antonio Pareja},
  journal={Headache},
  year={2006},
  volume={46 2},
  pages={
          298-305
        }
}
BACKGROUND The clinical features of cluster headache (CH) disclose some vascular changes in the symptomatic region, but few instrumental studies have assessed orbital hemodynamics in patients with this disorder. METHODS Orbital blood flow reactivity elicited by Valsalva maneuver (VM) was studied with ophthalmic artery eco-Doppler in 16 patients (14 men and 2 women; mean age: 41.2) suffering from episodic CH and in 18 healthy controls. Patients were examined twice: first, in a cluster period… CONTINUE READING
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