The cardiovascular system reactions at the fulfillment of the combined Stroop test by participants of Joint Forces Operation (JFO)
Introduction. Military with post-traumatic stress disorder have a high probability of development of diseases of the cardiac system. It is important to investigate the cardiovascular system reactions of supposedly healthy participants in combat operations to the cognitive load – fulfillment of complex Stroop test.
Purpose. The aim of research was to estimate the effect of cognitive load during fulfillment of the combined Stroop test on the state of the cardiovascular system (by the indices of ECG and heart rate variability) for the participants of Joint Forces Operation (ATO).
Methods. The study involved 13 participants of Joint Forces Operation (ATO). Stimuli (the word "Green" or "Red", "Blue" or "Yellow" written in relevant or irrelevant color) were exposed on the right or left from the center of the screen. In the case of congruence the word and its semantic meaning should press one button by the ipsilateral hand ("yes"), while in the case of mismatch – the other button by the contralateral one ("no"). There were used two tests. In Test 1 there were exposed 160 stimulus, while in the Test 2 – 400 stimulus. Test 1 was needed for veteran’s understanding the algorithm of the test. The latent periods of reaction (LP) and the number of errors were recorded.
Results. As a result of the correlation analysis of the LP of reactions with measured cardiological parameters, those of them that had statistically significant correlations with LP of reactions, were selected and a factor model based on them was constructed. The obtained data indicate the high sensitivity of the integral index of ST-T (II) and its components (ST segment shift and T wave amplitude) to the change in the functional state of the subjects, reflecting the tension of the myocardium, and also confirm the special role of the left hemisphere in the formation of psycho emotional stress in execution of cognitive load.
Originality. In this research was analyzed a wide range of cardiological parameters and connections of heart rate variability indices with the combined Stroop test parameters (by the original method), which allows to evaluate the interhemispheric interaction. The influence of the cognitive load on the myocardium functional state is demonstrated on the basis of factor model. The integral indicator ST-T allocated as the main cognitive stress marker.
Conclusion. Completing tasks that require long-term attention with simultaneously involving two signaling systems and interhemispheric transmission of information, have the greatest impact on the functional state of the myocardium, namely – causing an increase in tension of the heart muscle. The ST-T interval analysis is used in medicine for the diagnosis of coronary heart disease. We assume that the concentration on the correctness and speed of the task fulfillment by participants of Joint Forces Operation (ATO) affects the reserve function of the myocardium, and in the future may become a prerequisite for the development of cardiovascular system disorders.
Shvets A.V., Lukianchuk I.A. (2006). Physiological and hygienic description of conditions of professional activity of soldiers of peacekeeping contingents of the Armed Forces of Ukraine. Problemy viiskovoi okhorony zdorovia: Zbirnyk naukovykh prats Ukrainskoi viiskovo-medychnoi akademii. (Problems of Military Health: Collection of scientific works of the Ukrainian Military Medical Academy).16, 382-387. (in Ukr).
Hoge C.W., Castro C.A., Messer S.C., McGurk D., Cotting D.I., Koffman R.L. (2004). Combat duty in Iraq and Afghanistan, mental health problems, and barriers to care. New England Journal of Medicine, 351, 13-22, doi: 10.1056/NEJMoa040603.
Brusher E.A. Combat and Operational Stress Control. (2007). Combat and Operational Behavioral Health, 9(2), 111-122.
Burg M.M., Soufer R. (2016). Post-traumatic stress disorder and cardiovascular disease. Curr Cardiol Rep., 18(10), 94. doi: 10.1007/s11886-016-0770-5.
Trinka I.S., Kalnysh V.V., Shvets A.V., Maltsev O.V. (2016). Features of the influence of combat environment factors on soldiers. Viiskova medytsyna Ukrainy. (Military Medicine of Ukraine). 16(2), 84-94.(in Ukr).
Trinka I., Yeshchenko V., Kalnysh V., Pyshnov H. (2017) Save the soldier's health. Oboronnyi visnyk. (Defensive Herald). 27, 24–29.(in Ukr).
Clemente-Suarez V. J., Palomera P.R., Robles-Pérez J.J. (2018) Psychophysiological response to acute-high-stress combat situations in professional soldiers. Stress Health., 34 (2), 247-252, doi: 10.1002/smi.2778.
Kalnysh V., Pyshnov H., Shvets A. (2017). Cure the soul. Oboronnyi visnyk. (Defensive Herald). 3,20–25.(in Ukr).
Dyball D., Evans S., Boos C.J., Stevelink S.A.M., Fear N.T.(2019). The association between PTSD and cardiovascular disease and its risk factors in male veterans of the Iraq/Afghanistan conflicts: a systematic review. International Review of Psychiatry [Internet], 1, 1-15, doi: 10.1080/09540261.2019.1580686.
Kutsenko Т. (2017). Interhemispheric transfer of information in performance of complex Stroop test involving spatial properties by right- and left-handers. Vistnyk Cherkas'kogo Universytetu (Biological Sciences Series) (Cherkasy university bulletin: biological sciences series). 1, 37-47. (in Ukr).
Savonitto S., Ardissino D., Granger C.B. et al. (1999). Prognostic value of the admission electrocardiogram in acute coronary syndromes. JAMA, 281,707-713.
- There are currently no refbacks.