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Transcranial Doppler (TCD) after nitroglycerin in migraine without aura
E M Zanette1, A Agnoli, R Cerbo
1Department of Neurological Sciences, University La Sapienza, Rome, Italy.
Headache
|October 1, 1991
Summary
Nitroglycerin significantly decreased intracranial blood flow velocity and pulsatility index in migraine patients, more so than in healthy individuals. This suggests a heightened responsiveness to nitroglycerin in those with migraine.
Area of Science:
- Neurology
- Pharmacology
- Vascular Physiology
Background:
- Migraine is a complex neurological disorder often associated with cerebrovascular changes.
- Nitroglycerin is a potent vasodilator used clinically for various cardiovascular conditions.
- Understanding the cerebrovascular response to vasodilators in migraine is crucial for potential therapeutic strategies.
Purpose of the Study:
- To investigate the cerebrovascular effects of sublingual nitroglycerin in patients with migraine without aura.
- To compare the response to nitroglycerin in migraine patients versus healthy volunteers.
Main Methods:
- Nitroglycerin was administered sublingually to patients with migraine without aura and healthy controls.
- Transcranial Doppler sonography was used to measure systolic, diastolic, and time-mean flow velocities, and pulsatility index in major intracranial arteries.
- Measurements were taken before and after nitroglycerin administration.
Main Results:
- Migraine patients showed a significant decrease in systolic velocity, time-mean velocity, and pulsatility index after nitroglycerin.
- Healthy volunteers exhibited a significant decrease only in time-mean velocity.
- These findings indicate a differential vascular response to nitroglycerin between the two groups.
Conclusions:
- Migraine patients appear to have a more pronounced cerebrovascular response to nitroglycerin compared to healthy subjects.
- This heightened responsiveness may involve specific mechanisms related to migraine pathophysiology.
- Further research is warranted to explore the therapeutic implications of these findings in migraine management.