Exaggerated Reactivity of Parasympathetic Nerves Is Involved in Ventricular Fibrillation in J-Wave Syndrome.
J Cardiovasc Electrophysiol
; 28(3): 321-326, 2017 Mar.
Article
en En
| MEDLINE
| ID: mdl-27885745
ABSTRACT
INTRODUCTION:
Brugada syndrome (BrS) and early repolarization syndrome (ERS) are termed the J-wave syndrome. In most cases of J-wave syndrome, ventricular fibrillation (VF) often occurs around midnight or in the early morning when parasympathetic tone is augmented.OBJECTIVE:
The purpose of this study was to clarify the relationship between VF and autonomic nervous activity in patients with J-wave syndrome. METHODS ANDRESULTS:
We enrolled 28 consecutive patients with J-wave syndrome (20 BrS and 8 ERS) in whom implantable cardioverter defibrillators (ICDs) were implanted between January 2002 and December 2014. Eleven patients (39%) experienced ICD shock delivery due to VF recurrence after ICD implantation (recurrent-VF group). We investigated baroreflex sensitivity (BRS) using the phenylephrine method, heart rate variability (HRV) with Holter electrocardiography, plasma levels of norepinephrine, and cardiac 123 I-metaiodobenzylguanidine (MIBG) scintigraphy to estimate autonomic nervous function. Upon measurement of HRV, plasma levels of norepinephrine, and 123 I-MIBG testing, there was no significant difference between recurrent-VF and nonrecurrent-VF groups. However, BRS was significantly higher in the recurrent-VF group than in the nonrecurrent-VF group (P = 0.03). Kaplan-Meier curves suggested that high-BRS patients had higher VF recurrence than those with nonhigh-BRS (P = 0.04). Cox proportional hazards regression analyses showed that high BRS was associated independently with VF recurrence (P = 0.002).CONCLUSIONS:
Our results suggest that exaggerated reactivity of parasympathetic nerves, as represented by increased BRS, may underlie VF in patients with J-wave syndrome.Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Sistema Nervioso Parasimpático
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Fibrilación Ventricular
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Síndrome de Brugada
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Frecuencia Cardíaca
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Ventrículos Cardíacos
Tipo de estudio:
Diagnostic_studies
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Etiology_studies
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Prognostic_studies
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Risk_factors_studies
Límite:
Adult
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Female
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Humans
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Male
/
Middle aged
Idioma:
En
Revista:
J Cardiovasc Electrophysiol
Asunto de la revista:
ANGIOLOGIA
/
CARDIOLOGIA
/
FISIOLOGIA
Año:
2017
Tipo del documento:
Article
País de afiliación:
Japón