Неханевич, О.Б. (2015) Антропометричні особливості, стан провідної системи серця та вегетативної регуляції у спортсменів з атипово розташованими хордами лівого шлуночку. Вісник проблем біології і медицини, Вип. 3 (1). pp. 329-333. ISSN 2077-4214
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Abstract
Backgraund. In terms of cardiovascular complications prevention during physical training remains controversial issues impact atypically located chords (ALC) in the heart. ALC is fibro-muscular bands with conduction system cells that cross the ventricular cavity and not associated with valvular leaflets. Significantly different authors’ data on prevalence ALC is present. The frequency of additional chords according to autopsy ranged from 16.0%, while clinical research from 0.5% to 68.0%. Clinically ALC may not manifest throughout life. It gave a number of reasons clinicians express the thesis of the lack of influence on the quality of life and prognosis, as well as the development of heart disease. However, the results of other studies have indicated that the combination of ALC by fibro-muscular type with adverse factors (physical activity, psychological stress, pharmacological agents) could lead to the disruption of the heart rhythm due to the existence of additional ways of impulse excitation. Objective. The aim was to improve medical control for athletes with anomalously located left ventricular chordae by setting their impact on electrophysiological function of the heart contractile mechanisms and autonomic regulation status. Object and methods. To achieve the objectives we have examined 449 athletes aged 7 to 40 years (average age was 16,0±6,1 years), of which 64.8% men and 35.2% women. All athletes were held general clinical and instrumental examinations (electrocardiography (ECG), echocardiography (EchoCG), the study of heart rate variability (HRV) by standard methods. Using anthropometry and somatoscopy determined degree of involvement of connective tissue in the dysplastic process: calculated body mass index (BMI), signs dolyhostenomely, hypermobility of joints, spinal and chest deformity. According to the results of EchCG were selected 243 (54.1%) athletes with ALC of left ventricle, which formed the main group. In the control group included 206 (45.9%) athletes with normal heart structure. Results. Comparison groups for sports qualifications indicated that athletes with increasing skill levels decreased the percentage of people with ALC. Comparing age groups, we found a greater frequency ALC in children. In the study of physical development was established decrease BMI in athletes with ALC aged 7-18 years. In the analysis of cardiac structure was established substantial acceleration of excitation in the atria and ventricles, which manifested in reducing the length of PQ and QT intervals and P and T waves. Syndrome of early repolarization of the ventricles in general was seen in 5.1% of athletes, with 56.3% of those in the main group. In the group of athletes 7-18 years of highfrequency component of the wave ALC rate significantly higher than the level in the control group and was 49,0±23,9% and 35,8±17,7%, respectively (p <0.05). This low-frequency component was statistically significantly higher in athletes without ALC. Conclusions. The paper has been scientifically substantiated the need to consider the availability, characteristics of the location, plurality of false chords in the construction of training loads. It is proven link atypically located left ventricular chordae with other forms of connective tissue dysplasia (low body mass index, deformity of the chest and spine, hypermobility of joints, thickening of the mitral valve). Established acceleration of excitation in the atria and ventricles, and frequent early ventricular repolarization syndrome in patients with atypical located chords, indicating the presence of additional pathways of nerve impulses. It is shows the changes in autonomic regulation of the cardiovascular system in young children with atypically located chord.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | провідна система серця, атипово розташовані хорди, спортсмени; проводящая система сердца, атипично расположенные хорды, спортсмены; conducting system of the heart, false chord, athletes. |
| Subjects: | Physical rehabilitation, Sports Medicine |
| Divisions: | Departments > Department of Physical Rehabilitation, Sports Medicine and valeologii |
| Depositing User: | Елена Шрамко |
| Date Deposited: | 11 May 2017 10:43 |
| Last Modified: | 11 May 2017 10:43 |
| URI: | http://repo.dma.dp.ua/id/eprint/1671 |
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