Background: The development of the Arctic region is connected with extreme and strenuous work conditions and transmeridian shifts. The resulting stress changes the functional state of involved professionals irrespective of their age. Successful performance of job tasks depends on individual adaptation, which is an urgent issue to be studied with modern research methods. Aims: The study was a complex research project on adaptation and changes of cardiovascular and psychophysiological functioning in response to long-term stress associated with rapid climate changes and transmeridian shifts experienced by the participants of the Arctic World Oceanic International Flight Sever Vash. Materials and methods: The participants of Sever Vash expedition, which took place in July and August 2018, were examined. According to the design of the study, they underwent a complex laboratory and instrumental assessment before the start and immediately on the finish. Blood parameters, level of DNA damage in blood cells, cardiovascular parameters (heart rate, brachial and aortic blood pressure (BP), subendocardial blood flow etc.), allostatic load index (ALI), and data of psychophysiological tests with work capacity assessment were analyzed. Results: All participants (7 males, 3969 y.o.) completed the planned route. The actual duration of the flight was 43 days. Comparative pairwise analysis on the finish revealed an increase of total blood protein (p0.000), creatinine (p0.000), bilirubine (p=0.038) and AcAT (p=0.031), and glucose (p0.000) levels, and shifts in peripheral blood parameters, which are typical for the process of adaptation to the Polar conditions and transmeridian shifts. An increase of DNA damage in white blood cells was found. Average values of hemodynamic parameters were in a normal range; heart rate increased (p0.000); mean brachial BP (p=0.003) and systolic aortic BP (p=0.001) decreased. Average values of pulse BP and subendocardial blood flow did not change (p0.05). ALI increased in four pilots; in others, no ALI dynamic was observed. Psychophysiological potential decreased after the flight. The number of errors and omissions of target signal (р0.000) increased, attention span and emotional stability deteriorated. Along with this, the mood parameter increased to a maximum level, and risk tolerance level decreased (р0.001). Conclusions: Working in Arctic conditions is connected with stress factors and leads to multiple and deep changes required for urgent adaptation. Allostatic load index, which is an integral parameter of strained functioning in extreme conditions, can be a marker of individual adaptation. The achieved functional stability of body systems, particularly the cardiovascular system, ensures an acceptable level of work capacity in the considered conditions.
Цель. Провести сравнение результатов прогнозирования риска иБС по шка-лам sCOre, PrOCAM и framingham, а также вновь разработанным моделям риска иБС в когорте работников железнодорожного транспорта. Материал и методы. В исследование включено 106 пациентов-работников локомотивных бригад, которые находились под медицинским наблюдением в период с 2006 по 2015гг с проведением регулярных периодических и пред-рейсовых осмотров, углубленного обследования в кардиологическом отделе-нии. Диагноз иБС устанавливали при выявлении документально подтвержден-ных признаков коронарной ишемии миокарда, коронарного атеросклероза (по данным коронарографии, МСКТ). индивидуальный суммарный сердечно-сосу-дистый риск определяли по шкалам sCOre, PrOCAM, framingham и моделям прогнозирования иБС, полученным с использованием метода главных компо-нент (PCA), вероятностных нейросетей (PNN), деревьев решений (decisionTree) на основе комплекса показателей (включая индекс массы тела, липопротеиды низкой плотности, триглицериды, пульсовое АД и др.). Качество моделей оце-нивали по показателям чувствительности, специфичности, средней абсолютной ошибки прогнозирования, площади под rOC-кривой (AUC). Результаты. распределение на категории риска (низкий, умеренный, высокий) по калькуляторам sCOre, PrOCAM и framingham характеризовалось противоре-чивыми результатами; в группе с иБС при низком риске по этим шкалам сер-дечно-сосудистые события (инфаркт миокарда и/или операция на коронарных артериях) отмечались у 51,9%, 5,56% и 42,6%, соответственно. AUC для sCOre, PrOCAM и framingham в определении класса "иБС" были равными 0,72, 0,65 и 0,69, соответственно, но класса "инфаркт миокарда" -только 0,34, 0,42 и 0, 32. AUC для модели PNN для классов "иБС" составила 0,55, "инфаркт миокарда" -0,60. Средняя абсолютная ошибка прогнозирования высокого риска иБС по шка-лам sCOre, PrOCAM и модели PNN составила 0,88, 0,56 и 0,46. заключение. Шкалы sCOre, PrOCAM и framingham характеризуются несогла-сованностью результата устанавливаемой категории риска иБС и недостаточной точностью в отношении прогнозирования инфаркта миокарда в когорте мужчин среднего возраста, работающих на железнодорожном транспорте, что ограничи-вает их применение. разработанная модель PNN показывает, что ошибка про-гноза ниже у моделей с включением дополнительных факторов (пульсовое давле-ние, тромбоциты, триглицериды, индекс массы миокарда и др.). Aim. To conduct a comparison of iHd risk prediction with the sCOre, PrOCAM and framingham scores, as novel developed models of iHd risk in cohort of the railroad workers. Material and methods. Totally, 106 patients included -workers of locomotive crews, who had been under medical observation during 2006-2015 years with regular scheduled physician observations, incl. preflight, in-depth investigation during in-patient cardiological hospitalization. iHd diagnosis was set if documentarily confirmed signs of coronary ischemia of myocard were found, or coronary atherosclerosis (by angiography, MdCT). individual total vascular risk was estimated by sCOre, PrOCA...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.