Autonomic support of the activity in children with small cardiac abnormalities

The aim of the study was to investigate vegetative maintenance (VM) in children with small cardiac abnormalities (SCA) using a wedge-orthostatic test (WOT). The article describes the research results of 170 children with SCA. VM was estimated with clinic orthostatic test (COT). The group of patients consisted of 106 children with mitral valve prolapse (MVP) and 64 children with false tendons (FT) in the left cardiac ventricular. We used absolute and relative statistical methods with Microsoft Excel program for this study. We found out that hypersympathycotonic type of VM was prevalent at MVP (57,6%). For FT it was only 37,5%. Pathologic type of VM with insufficient activation of sympathetic adrenal system was noted only in 21,2% of patients with SCA. This species is more common with FT (23.4%) than with MVP (19.8%). Hyper diastolic type was present only in 9,4% patients with MVP and in 3,1% with FT, respectively. Mixed types were rare noted at SCA without specification for MVP or FT (4.7% for MVP and 3.2% for FT). Thus, the revealed types of COT show the disorder of VM, which characterizes the reducing of adaptive capacity in such children.

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Heart Rate Variability of Children with Mitral Valve Prolapse in Orthostatic Test

Ukraïnsʹkij žurnal medicini bìologìï ta sportu ◽

10.26693/jmbs06.03.293 ◽

2021 ◽

Vol 6 (3) ◽

pp. 293-299

Author(s):

T. M. Krainyk ◽

◽

S. H. Starodubtsev ◽

O. V. Petrenko ◽

O. V. Dovgan ◽

...

Keyword(s):

Heart Rate ◽

Nervous System ◽

Mitral Valve ◽

Mitral Valve Prolapse ◽

Sinus Node ◽

Low Frequency ◽

Control Group ◽

Orthostatic Test ◽

Very Low Frequency ◽

Mode Amplitude

The purpose of the research was to study the state of autonomic regulation in prepubertal children with mitral valve prolapse during an orthostatic test Materials and methods. The study involved 2 groups: the main – 26 children aged 10-11 years with mitral valve prolapse, and a control group – 22 relatively healthy children. The adaptive mechanisms were monitored by analyzing heart rate variability. All children participated in a cardiorhythmic examination at rest lying down and during an active orthostatic test. Results and discussion. Among the indicators that had significant differences, the indicators of regulatory process adequacy index and mode amplitude should be noted. In the group of children with mitral valve prolapse, an increase of the regulatory process adequacy index indicated the predominance of the functioning of the sinus node over the activity of the sympathetic division of the autonomic nervous system. An increase in the adequacy index and mode amplitude indicates the connection of the central structures of rhythm control (subcortical rhythms) during a change in body position. Stress index also increased. This index of tension of regulatory systems shows the activity of the mechanisms of sympathetic regulation, the state of central regulation. Children in the control group had a well-coordinated response of the sympathetic nervous system to the orthostatic test: the low frequency spectrum and very low frequency indicators increased. While in main group, the value of low frequency spectrum (the work of the sinus node) increased, the value of very low frequency (the reaction of the central structures of the nervous system) decreased. This indicates dysfunction of the most important reactions, which also affects the daily activities of children, increases the risk of mitral valve prolapse complications. Conclusion. In children with mitral valve prolapse, the absence of a pronounced typical reaction to an ortho test is a reflection of an adaptive-regulatory overstrain in conditions of morphological determinacy of connective tissue dysplasia, which are trying to ensure the adequacy of intracardiac hemodynamics. The data obtained will be useful for predicting the reaction of the body of children with mitral valve prolapse to physical activity of varying intensity

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Cardiovascular Abnormalities in Children With Fragile X Syndrome

PEDIATRICS ◽

10.1542/peds.91.4.714 ◽

1993 ◽

Vol 91 (4) ◽

pp. 714-715

Author(s):

Linda S. Crabbe ◽

Lusia Hornstein ◽

Andrew S. Bensky ◽

David C. Schwartz

Keyword(s):

Mitral Valve ◽

Young Children ◽

Fragile X Syndrome ◽

Aortic Root ◽

Mitral Valve Prolapse ◽

Fragile X ◽

Late Childhood ◽

Childhood And Adolescence ◽

Cardiac Abnormalities ◽

Cardiovascular Abnormalities

It has been suggested by several authors that the prevalence of mitral valve prolapse and aortic root dilation is increased in individuals with the fragile X syndrome. The prevalence of these abnormalities in young children with fragile X has not been established. Sixteen boys and 1 girl 13 years or younger were studied. Only 1 child (6%) had the typical examination findings of mitral valve prolapse, although his echocardiogram was normal. From this study it appears that cardiac abnormalities in fragile X syndrome develop in late childhood and adolescence. It seems important to follow these children carefully so that these cardiac abnormalities can be documented when they do develop.

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Mitral Valve Prolapse: Associations with Symptoms and Anxiety

PEDIATRICS ◽

10.1542/peds.85.3.311 ◽

1990 ◽

Vol 85 (3) ◽

pp. 311-315

Author(s):

Cynthia L. Arfken ◽

Anthony S. Lachman ◽

Margaret J. McLaren ◽

Peter Schulman ◽

Charles N. Leach ◽

...

Keyword(s):

Mitral Valve ◽

Mitral Valve Prolapse ◽

Adult Population ◽

Systolic Murmur ◽

Cardiac Abnormalities

Mitral valve prolapse has been studied extensively in the adult population, but less is known about it in children. Therefore, 813 children between 9 and 14 years of age were examined by a team of cardiologists and technicians. The children also responded to a questionnaire concerning the presence of symptoms and the What I Think and Feel anxiety instrument. The prevalence of mitral valve prolapse using auscultatory criteria was 4.2% (6.2% for girls, 2.3% for boys). Of those with mitral valve prolapse, 85% had a solitary click, 9% had a click and systolic murmur, and 6% had multiple clicks. Children with auscultatory mitral valve prolapse were less likely to have symptoms than those free of cardiac abnormalities. No difference in average anxiety scores was detected between the two groups. It is concluded that auscultatory mitral valve prolapse is common in children and not accompanied by an increased likelihood of symptoms or anxiety.

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