CHANGES OF SPECTRAL ANALYSIS OF CARDIAC RHYTHM DURING ORTHOSTATIC STRESS IN INDIVIDUALS WITH DIFFERENT LEVELS OF REGULATORY MECHANISMS
DOI:
https://doi.org/10.11603/1811-2471.2017.v0.i1.7655Keywords:
spectral analysis of cardiac rhythm, regulation, orthostasis.Abstract
Students constantly work under stressful conditions, have a sedentary lifestyle, which can lead to breakdown of regulatory mechanisms, such as, the autonomic nervous system (ANS).
Objective – to study the particularities changes in the spectral analysis of the heart rhythm in persons with moderate predominance of the central and autonomic regulation contours in response to the orthostatic load.
Materials and Methods. 61 men and 66 women of 17-21 years old were examined. Spectral analysis of autonomic regulation of the heart rhythm was carried out in lying position and on the 6 min of the orthostasis with an apparatus “VNS-Micro”. The students were divided into 2 groups: with a moderate predominance of the central contour of regulation (CCR) (LF>HF>VLF) and with a moderate predominance of the autonomic regulation (ACR) (HF>LF>VLF).
Results. In the lying position in men with CCR were less HF, % HF, higher LF/HF, % LF, in orthostasis – less LF. In women with CCR in the lying position, were detected smaller TP, VLF, HF, % HF, greater LF/HF, % VLF, % LF. In orthostasis, in all persons, the tone of the sympathetic part of the ANS increased and parasympathetic – decreased. In men with CCR in orthostasis the increase of sympathetic regulation was due to VLF and % VLF, and with ACR – VLF, % VLF, LF and % LF. In women with CCR in orthostasis increased TP, VLF, % VLF and LF, with ACR – VLF, % VLF, % LF, and decreased TP, HF.
Conclusions. In persons of both sexes, orthostasis is triggered by adequate mechanisms of the cardiovascular system regulating, which depend on the initial level of autonomic regulation: increase cerebral ergotropic influences, activity of energy-metabolic regulation link, decrease the activity of the parasympathetic link. In a moderate predominance of autonomic regulation of the heart rhythm in orthostasis additionally increase the activity of the subcortical sympathetic vasomotor center.
References
Baevskiy, R.М. & Ivanov, G.G. (2001). Variabel’nost’ serdechnogo ritma : teoreticheskie aspekty i vozmozhnosti klinicheskogo primeneniya [Heart rate variability: theoretical aspects and possibilities of clinical use]. Ul’trazvukovaya I funccional’naya diagnostika – Ultrasonic and functional diagnostics, 3, 108–127 [in Russian].
Baevskiy, R.М., & Berseneva, A.P. (2008). Vvedenie v donozologicheskuyu diagnostiku [Introduction to donosological diagnostics]. Moskwa: Slovo [in Russian].
Mikhailov, V.М. (2002). Variabel’nost’ ritma serdca : opyt practicheskogo primeneniya metoda [Heart rate variability: experience of practical application of the method]. Ivanovo : Ivan. gos. med. academiya [in Russian].
Shlyk, N.I., Sapozhnikova, E.N., Kirillova, T.G., & Zhuzhgov, A.P. (2012). Ob osobennostyakh ortostaticheskoi regulyatsii u sportsmenov s raznymi tipami vegetativnoi regulyatsii [On the peculiarities of orthostatic regulation in athletes with different types of vegetative regulation]. Biologiya. Nauka o zemle. Vestnik Udmurdskogo universiteta – Biology. The science of the earth. Bulletin of the Udmurt University, 1, 114– 125. [in Russian].
Drozdova, I.V., Borysyuk, V.S., & Stoyanov, V.S. (2008). Rol’ stressov v stratifikacii obshchego serdechno-sosudistogo riska u bol’nykh arterial’noi gipertenziei [The role of stress in the stratification of the overall cardiovascular risk in patients with arterial hypertension]. Vestnik fizioterapii I kurortologii – Bulletin of Physiotherapy and Balneology, 14 (1), 66–70. [in Russian].
Kuznetsova, L.M., Kuznetsov, V.D., & Timoshenko, K.T. (2008). Pokazateli psikhicheskogo zdorovya sovremennykh starsheckassnikov I studentov vuza [Indicators of mental health of modern high school students and university students]. Gigiyena i sanitariya – Hygiene and sanitation, 3, 59–63. [in Russian].
Sidorov, P.I., Solovyov, A.G., & Novikova I.A. (2006). Psikhosomaticheskaya medicina: Rukovodstvo dlya vrachei [Psychosomatic Medicine: (Manual for Physicians)]. М.: МЕD-press-inform. [in Russian].
Boulmier, D. & Bazin P. (2000). Myocardial pseudo-infarction : “stress”-associated catecholamine-induced acute cardiomyopathy or coronary spasm? Ann. Cardiol. Angeiol (Paris), 49 (8), 449–454.
Heart rate variability. Standards of measurements, physiological interpretation, and clinical use. Task forse of the European society of cardiology and the Notrh American society of pacing and electrophysiology (1996). Eur. Heart J,. 17, 354–381.
Golzio, P.G., Orzan, F., Ferrero, P., Bobbio, M., Bergerone, S., Di Leo, M., et al. (2004)Myocardial infarction with normal coronary arteries : ten-year follow-up. Ital. Heart J., 5 (10), 732–738.
