Characterisation of breathing and associated central autonomic dysfunction in the Rett disorder
POO Julu, AM Kerr, F Apartopoulos… - Archives of disease in …, 2001 - adc.bmj.com
POO Julu, AM Kerr, F Apartopoulos, S Al-Rawas, IW Engerström, L Engerström, GA Jamal…
Archives of disease in childhood, 2001•adc.bmj.comAIM To investigate breathing rhythm and brain stem autonomic control in patients with Rett
disorder. SETTING Two university teaching hospitals in the United Kingdom and the Rett
Centre, Sweden. PATIENTS 56 female patients with Rett disorder, aged 2–35 years; 11
controls aged 5–28 years. DESIGN One hour recordings of breathing movement, blood
pressure, ECG RR interval, heart rate, transcutaneous blood gases, cardiac vagal tone, and
cardiac sensitivity to baroreflex measured on-line with synchronous EEG and video …
disorder. SETTING Two university teaching hospitals in the United Kingdom and the Rett
Centre, Sweden. PATIENTS 56 female patients with Rett disorder, aged 2–35 years; 11
controls aged 5–28 years. DESIGN One hour recordings of breathing movement, blood
pressure, ECG RR interval, heart rate, transcutaneous blood gases, cardiac vagal tone, and
cardiac sensitivity to baroreflex measured on-line with synchronous EEG and video …
AIM
To investigate breathing rhythm and brain stem autonomic control in patients with Rett disorder.
SETTING
Two university teaching hospitals in the United Kingdom and the Rett Centre, Sweden.
PATIENTS
56 female patients with Rett disorder, aged 2–35 years; 11 controls aged 5–28 years.
DESIGN
One hour recordings of breathing movement, blood pressure, ECG R-R interval, heart rate, transcutaneous blood gases, cardiac vagal tone, and cardiac sensitivity to baroreflex measured on-line with synchronous EEG and video. Breathing rhythms were analysed in 47 cases.
RESULTS
Respiratory rhythm was normal during sleep and abnormal in the waking state. Forced and apneustic breathing were prominent among 5–10 year olds, and Valsalva breathing in the over 18 year olds, who were also most likely to breathe normally. Inadequate breathing peaked among 10–18 year olds. Inadequate and exaggerated breathing was associated with vacant spells. Resting cardiac vagal tone and cardiac sensitivity to baroreflex were reduced.
CONCLUSIONS
Labile respiratory rhythms and poor integrative inhibition in Rett disorder suggest brain immaturity. Linking this to an early monoaminergic defect suggests possible targets for the MECP2 gene in clinical intervention. Exaggerated and inadequate autonomic responses may contribute to sudden death.
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