POWER SPECTRAL-ANALYSIS OF HEART-RATE AND DIASTOLIC BLOOD-PRESSURE VARIABILITY IN MIGRAINE WITH AND WITHOUT AURA

Autonomic function in migraineurs during headache-free periods was stu died by means of cardiovascular reflexes and power spectral analysis o f heart: rate and diastolic blood pressure variability. We tie examine d 56 patients: 37 suffering from migraine without aura and 19 from mig raine with aura, Cardiovascular responses to the tilt test and Valsalv a manoeuvre showed a normal function of the overall baroreceptor refle x asc. Normal heart rate responses to Valsalva manoeuvre and deep brea thing suggested an intact parasympathetic function. Power spectral ana lysis of both heart rate and diastolic blood pressure variability in b asal conditions and during orthostatic test showed similar sympathovag al interactions modulating cardiovascular control in migraine patients and in controls.