2018
DOI: 10.1111/pace.13270
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Dysautonomy in different death risk groups (Rassi score) in patients with Chagas heart disease

Abstract: The loss of parasympathetic modulation was present in all Rassi risk groups, including the low risk, indicating that a morphological change of the myocardium represents a detectable neurofunctional change.

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Cited by 10 publications
(13 citation statements)
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References 29 publications
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“…157 Cardiac arrhythmias and SD are common and may occur at any stage of progression, even in individuals without significant structural disease. 158 , 159 Sustained ventricular tachycardia is the main cause of SD, and is associated with LV dysfunction, syncope and non-sustained ventricular tachycardia in Holter monitoring or the exercise testing. 160 , 161 In addition, sinus node dysfunction, atrioventricular and intraventricular conduction disorders are common findings in patients with Chagas disease and may progress to complete atrioventricular block.…”
Section: Individuals With Cardiomyopathies and Myocarditismentioning
confidence: 99%
“…157 Cardiac arrhythmias and SD are common and may occur at any stage of progression, even in individuals without significant structural disease. 158 , 159 Sustained ventricular tachycardia is the main cause of SD, and is associated with LV dysfunction, syncope and non-sustained ventricular tachycardia in Holter monitoring or the exercise testing. 160 , 161 In addition, sinus node dysfunction, atrioventricular and intraventricular conduction disorders are common findings in patients with Chagas disease and may progress to complete atrioventricular block.…”
Section: Individuals With Cardiomyopathies and Myocarditismentioning
confidence: 99%
“…Para Gimenez et al (2003), pNN50 mayores al 15%, son considerados de alta variabilidad, mientras que resultados menores al 4%, son clasificados como de baja variabilidad. De acuerdo con este concepto, las pacientes chagasicos de este estudio, muestran una variabilidad muy baja, situación que, en forma semejante a los resultados de las otras variables del dominio temporal de la VFC, se considera como consecuencia de la disfunción autonómica en el control cardiaco y reducción de los parámetros de modulación vagal e incremento de los de modulación simpática, con predominio de la alteración vagal (Merejo et al 2018). Octavio et al (2004) reportaron una pNN50 de 24hs en controles, de 14,5±10,8% y 13,2±9,9%, en Chagas, resultado cercano en los controles de este reporte, pero muy alejado para el caso de los seropositivos, lo cual, podría ser consecuencia del grado de afectación cardiaca de los pacientes involucrados en los dos estudios.…”
Section: Resultados Y Discusiónunclassified
“…2015). El estudio de la VFC permite determinar el equilibrio simpático-vagal de una manera indirecta (Belerenian et al 2001;Álvarez & Cruz, 2011;Buzzano et al 2012;Merejo et al 2018;Fortes et al 2018).…”
Section: Introductionunclassified
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“…Previous studies have suggested that Chagas' parasite T. cruzi not only increases the survival, differentiation, and catecholamine production of dopaminergic neuronal cells, but also alters cholinergic gene expression in Chagas' disease patients . Indeed, it seems that dysautonomy in patients with Chagas heart disease is not only related to augmented sympathetic activity, but also to loss of parasympathetic modulation . Accordingly, cholinergic function is impaired in chronic Chagas disease in rats, an effect that may also be caused by autoimmunological mechanisms …”
Section: Discussionmentioning
confidence: 99%