Jun 1, 1996

Evaluation of the autonomic cardiovascular response in Arnold-Chiari deformities and cough syncope syndrome

Archives of Neurology
P D IrelandB Goldstein


To study the autonomic control of heart rate in patients with Arnold-Chiari deformity types I and II who exhibit the signs and symptoms of cough syncope syndrome. Prospective, clinical descriptive study. University clinical research center. Nine patients with Arnold-Chiari deformity and cough syncope syndrome. None. Changes in heart rate, blood pressure, and electrocardiograms for power spectral analysis of heart rate variability were studied in the supine and standing positions, preoperatively (n = 9) and postoperatively (n = 5). Preoperatively, 8 (89%) of 9 patients increased their heart rate after postural change from supine to standing (mean +/- SD delta = 13 +/- 13 beats per minute [bpm]). Postoperatively, 4 (80%) of the 5 patients exhibited a greater increase in standing heart rate (mean delta = 19 +/- 16 bpm) compared with preoperative values. Changes in systolic, diastolic, and mean blood pressure with postural change were variable. Preoperatively, all patients exhibited abnormal control of heart rate in response to postural change. Three patients (33%) showed an abnormal decrease in low-frequency heart rate power (mean delta = -27 +/- 35 bpm2); the remaining 6 (67%) demonstrated an abnormal increase in high-frequency h...Continue Reading

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Mentioned in this Paper

Syncope, Tussive
Diastolic Blood Pressure
Cardiovascular Diseases
Signal Processing, Digital
Congenital Central Hypoventilation
Blood Pressure
Signs and Symptoms

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