The Relationship Between Heart Rate Variability Parameters and Atrioventricular Nodal Reentrant Tachycardia

Year 2018, Volume: 21 Issue: 2, 128 - 134, 19.08.2018

Lütfü Aşkın , Serdar Türkmen

Abstract

Introduction:
Heart
rate variability (HRV) is associated with sympathetic tone. Studies have
disputed the interpretation of the low frequency (LF) and low/high frequency
(LF/HF) ratio for the indication of sympathetic cardiac control and autonomic
balance. This study aims to investigate the association between HRV parameters
and atrioventricular nodal reentrant tachycardia (AVNRT) and observe the effect
of autonomic nervous system on AVNRT.

Patients
and Methods: In total, 354 subjects with palpitations underwent the
electrophysiological study (EPS). Most (71%; 253/354) patients had at least an
ambulatory Holter ECG recording of 24 h. As a consequence of the exclusion
criteria, 160 individuals were classified into two groups: control group (no
arrhythmia induced, n= 90) and AVNRT group (n= 70).

Results: Daytime
and nighttime LF and LF/HF ratio were significantly higher in the AVNRT group
(p< 0.05) than in the control group. Interestingly, daytime ultra-LF, very
LF, and total power were significantly lower in the AVNRT group.

Conclusion: AVNRT is associated with
altered sympathovagal balance. Furthermore, increased LF and LF/HF may be
indicative of enhanced sympathetic activity in patients with AVNRT because of
inhomogeneous ventricular activation via the slow accessory pathway.

Keywords

Atrioventricular nodal reentrant tachycardia, heart rate variability, low frequency, low/high frequency

Kalp Hızı Değişkenliği Parametreleri ile Atriyoventriküler Nodal Reentrant Taşikardi Arasındaki İlişki

Abstract

Giriş: Kalp hızı değişkenliği (HRV) sempatik ton ile ilişkilidir. Çalışmalar
sempatik kardiyak kontrol ve otonom denge endikasyonu için düşük frekans (LF)
ve düşük/yüksek frekans (LF/HF) oranının yorumlamasını tartışmışlardır. Bu
çalışma, HRV parametreleri ile atriyoventriküler nodal reentrant taşikardi
(AVNRT) arasındaki ilişkiyi araştırmayı ve otonomik sinir sisteminin AVNRT
üzerindeki etkisini gözlemeyi amaçlamaktadır.

Hastalar ve
Yöntem: Çarpıntısı olan 354 olguya elektrofizyolojik çalışma
yapıldı (EPS). Hastaların %71 (253/354)'i en az bir 24 saatlik ambulatuvar
Holter elektrokardiyografi (EKG) kaydına sahipti. Dışlama kriterlerinin bir
sonucu olarak, 160 birey iki gruba ayrıldı; kontrol grubu (aritmi indüklenmedi,
n= 90) ve AVNRT grubu (n= 70).

Bulgular: Gündüz ve gece LF ve LF/HF oranı AVNRT'de kontrollerden anlamlı derecede
yüksekti (p< 0.05). İlginç olarak, gündüz ultra düşük frekans, çok düşük
frekans ve toplam güç AVNRT’de anlamlı olarak düşüktü.

Sonuç: AVNRT değişmiş sempatovagal
denge ile ilişkilidir. Dahası, artmış LF ve LF/HF, AVNRT hastalarında yavaş
aksesuar yolla homojen olmayan ventriküler aktivasyonun bir sonucu olarak
artmış sempatik aktivitenin bir göstergesi olabilir.

Keywords

Atriyoventriküler nodal reentrant taşikardi, kalp hızı değişkenliği, düşük frekans, düşük/yüksek frekans

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