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Yıl:2008; Cilt: 46; Sayı: 3>> Özet
TAM METİN
Yeni Symposium; 2008;46(3):137-142
R-R Interval Variability Analysis With Electromyography Detects Early Autonomic Neuropathy In Diabetic Children
N Turgut, S Karasalihoğlu, Y Küçükuğurluoğlu, K Balcı, G Ekuklu
Trakya University Medical Faculty Neurology, Edirne, Turkey
Amaç: Diyabetik hastalarda otonomik nöropati periferik nöropatiye eşlik edebilmekte, mortalite ve
morbidite üzerine olan önemli etkilerinden dolayı özellikle de kardiyak otonomik nöropatinin erken
tanısı önem kazanmaktadır. R-R interval değişkenliğindeki (RRID) azalma kardiyak otonomik nöropatinin
önemli bir göstergesidir. Çalışmamızda RRID elektromiyografi (EMG) cihazı ile değerlendirilmiş,
kardiyak otonomik nöropati klinik bulguları olmayan diyabetik çocuklarda RRID incelenmiştir.
Yöntem: Çalışmaya periferik nöropatisi olmayan 64 sağlıklı (yaş ortalaması 9.5±1.8) ve 33 tip 1 diyabeti
olan (yaş ortalaması 10.2±2.8) çocuk alındı. Kayıtlamalar EMG cihazı ile yapıldı ve RRID hem
sakin hem de derin solunum sırasında değerlendirildi. Göğüs ön duvarına iki yüzeysel elektrod yerleştirildi,
tetik modu ve gecikme hattı kullanılarak iki QRS kompleksi ekranda görüntülendi. İlk QRS
kompleksi tetik potansiyel olarak alındı ve ikinci QRS kompleksindeki zamansal varyasyon RRID
olarak tanımlandı ve değerler oran cinsinden belirlendi.
Bulgular: Sağlıklı çocuklarda RRID istirahatte %23.9±9.5, hiperventilasyonda %25.6±10.2, diyabetik
çocuklarda RRID istirahatte %17.4±6.6, hiperventilasyonda %22±8.9 olarak bulundu. RRID istirahat değerleri diyabetik çocuklarda anlamlı olarak düşük bulunurken (P=0.001), gruplar arasında
hiperventilasyon sırasında fark saptanmadı (P=0.4).
Tartışma: Bulgularımız kardiyak otonomik nöropati klinik bulguları olmayan diyabetik çocuklarda
RRID ile kardiyak tutulumun tespit edilebildiğini göstermiştir.
Sonuç: Kullandığımız teknik zaman almayan, EMG laboratuarlarında kolaylıkla uygulanabilen,
kardiyak otonomik tutulumun varlığını ortaya koyan bir tekniktir
Diyabetik Çocuklarda Erken Dönemdeki Otonomik Nöropati Tespitinde R-R İnterval Değişkenliğinin Elektromiyografi ile Analizi
Purpose: Autonomic neuropathy may exist together with peripheral neuropathy, especially in diabetic
patients and it is important to diagnose early autonomic neuropathy especially cardiac one
because of their serious effects on mortality and morbidity rates. A decrement of R-R interval variability
(RRIV) is a good marker for cardiac autonomic neuropathy. We analyzed RRIV with an alternative
method using electromyography machine, and assessed the RRIV in diabetic children
who have no clinical sign of cardiac autonomic neuropathy.
Method: 64 healthy (mean age 9.5±1.8) and 33 type 1 diabetic (mean age 10.2±2.8) children who
have no peripheral neuropathy were included. Recording was made on EMG machine and RRIV
was obtained during quiet and deep breathing. Two surface electrodes were placed on the chest,
and using triggering mode and delay line, two QRS complexes displayed on the screen. Since the
first QRS complex was triggering potential, variation in timing of the second QRS complex represented
variation in the R-R interval. RRIV was expressed as a percentage of the average R-R interval.
Results: In healthy children, RRIV was 23.9±9.5% in rest and 25.6±10.2% in hyperventilation. In diabetic
children, RRIV was 17,4±6.6% in rest, 22±8.9% in hyperventilation. Resting RRIV was lower
in diabetic children than healthy children (p=0.001), but there was no difference between groups
in hyperventilation (p=0.4).
Discussion: Our findings suggest that RRIV may have value to determine cardiac autonomic neuropathy
in diabetic children who have no clinical sign of cardiac autonomic neuropathy.
Conclusion: The technique, we used is a non time consuming procedure, easily performed in EMG
laboratory, and is a simple way of reflecting autonomic dysfunction of the heart.

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