Background The pathogenesis of idiopathic monomorphic ventricular tachycardia is not clear. We suppose that a lack of balance of the sympathetic system could be involved. Frequency domain analyses of the heart rate can be useful to understand autonomic system balance. Therefore we performed this evaluation on a sample of seven children affected by idiopathic monomorphic ventricular tachycardia. Methods and results We performed a Holter recording for palpitations on all the children, with an average age of 12 (range: 7-18 years). In all the patients many episodes of repeated sustained or nonsustained ventricular tachycardia were demonstrated, with an average heart rate of 170 bpm. We excluded any structural heart defect through echocardiography and magnetic resonance imaging studies in all the children. A negative tridimensional electroanatomic mapping was performed on five of them. Holter analysis of ventricular rate variability was performed in the frequency domain. Two main components were distinguished in a spectrum calculated on the basis of 24h-long recordings. We studied low frequency and high frequency components. We compared the values obtained with those of a control group of 10 healthy children, admitted to our cardiology division, day-care system. Affected patients showed a reduction of average high frequency as a sign of a reduction of vagal activity and an average increase of the low frequency/high frequency ratio. Conclusions The data may confirm our hypothesis of the involvement of the sympathetic nervous system in idiopathic monomorphic ventricular tachycardia in children

Fazio, G., Novo, G., Sutera, L., Di Gesaro, G., Fazio, M., D'Angelo, L., et al. (2008). Sympathetic tone and ventricular tachycardia. JOURNAL OF CARDIOVASCULAR MEDICINE, 9(9), 963-966 [10.2459/JCM.0b013e3282fbca9a].

Sympathetic tone and ventricular tachycardia

FAZIO, Giovanni;NOVO, Giuseppina;NOVO, Salvatore
2008-01-01

Abstract

Background The pathogenesis of idiopathic monomorphic ventricular tachycardia is not clear. We suppose that a lack of balance of the sympathetic system could be involved. Frequency domain analyses of the heart rate can be useful to understand autonomic system balance. Therefore we performed this evaluation on a sample of seven children affected by idiopathic monomorphic ventricular tachycardia. Methods and results We performed a Holter recording for palpitations on all the children, with an average age of 12 (range: 7-18 years). In all the patients many episodes of repeated sustained or nonsustained ventricular tachycardia were demonstrated, with an average heart rate of 170 bpm. We excluded any structural heart defect through echocardiography and magnetic resonance imaging studies in all the children. A negative tridimensional electroanatomic mapping was performed on five of them. Holter analysis of ventricular rate variability was performed in the frequency domain. Two main components were distinguished in a spectrum calculated on the basis of 24h-long recordings. We studied low frequency and high frequency components. We compared the values obtained with those of a control group of 10 healthy children, admitted to our cardiology division, day-care system. Affected patients showed a reduction of average high frequency as a sign of a reduction of vagal activity and an average increase of the low frequency/high frequency ratio. Conclusions The data may confirm our hypothesis of the involvement of the sympathetic nervous system in idiopathic monomorphic ventricular tachycardia in children
2008
Fazio, G., Novo, G., Sutera, L., Di Gesaro, G., Fazio, M., D'Angelo, L., et al. (2008). Sympathetic tone and ventricular tachycardia. JOURNAL OF CARDIOVASCULAR MEDICINE, 9(9), 963-966 [10.2459/JCM.0b013e3282fbca9a].
File in questo prodotto:
File Dimensione Formato  
sympatetic tone.pdf

Solo gestori archvio

Dimensione 271.59 kB
Formato Adobe PDF
271.59 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/47328
Citazioni
  • ???jsp.display-item.citation.pmc??? 1
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 4
social impact