ObjectivesTo investigate the relationship between changes in circadian patterns of melatonin and clinical manifestations of polymorbid cardiovascular pathology (PCVP) in young men and to analyze the effectiveness of their complex treatment.Materials and methodsWe made the immunohistochemical (IHC) analysis of epiphysis tissues from autopsies of 25 men aged 32–44 with PCVP and metabolic syndrome (MS) who had died as a result of ischemic cardiomyopathy (IC) and 25 persons after the car accident as a control group. Then, 93 young men aged 35–44 with PCVP, metabolic syndrome, and depressive spectrum disorders (DSD) were divided into three groups: (1) standard therapy; (2) standard therapy and psychotherapy sessions; (3) standard therapy in combination with psychotherapeutic and psychophysiological visual and auditory correction sessions. The control group included 24 conditionally healthy male volunteers. Before and after the treatment, we studied the anthropometric status, lipid and carbohydrate metabolism indicators, the level of urinary 6-hydroxymelatonin sulfate, the degree of nocturnal decrease in blood pressure (BP), and the relationship of these indicators with circadian variations of melatonin excretion.ResultsYoung polymorbid patients who died from IC have a lower expression of melatonin type 1 and 2 receptors. All patients with PCVP showed a decrease in the nocturnal melatonin excretion fraction and a correlation with higher severity of depressive (r = −0.72) and anxiety (r = −0.66) symptoms. Reduced values of the 6-hydroxymelatonin sulfate (6-SM) in the 1st (r = 0.45), 2nd (r = 0.39), and 3rd (r = 0.51) groups before treatment was associated with periods of increased BP. The achievement of melatonin excretion reference values and normalization of biochemical parameters of carbohydrate and lipid metabolism, daily BP profile, and psychophysiological state were noted in all three patients’ groups, with a more pronounced effect in group 3.ConclusionLow nocturnal melatonin excretion levels are associated with greater severity of clinical symptoms and a higher risk of death in patients with PCVP. Therefore, comprehensive therapy may be more effective for correcting this disease.

Age-related changes in the body and concomitant somatic pathology can have a significant impact on the body adaptation processes to operational stress, which is associated with the development of adverse events in the intraoperative period, postoperative complications and long-term prognosis. Both the initial state of the body and the severity of changes in metabolism in response to operational stress, as well as the involvement degree of the body functional reserves, are important. Traditionally used methods for risk stratification, based on a patient’s survey or assessment of his daily activity, do not always provide a comprehensive, objective assessment of the body functional capabilities, especially in patients of older age groups. The prognostic value of cardiopulmonary exercise testing for determining the indications and the risk of complications in various types of surgical interventions has been proved. Based on the results of preoperative cardiopulmonary exercise testing, it is possible to make a more complete, comprehensive assessment of the patient’s body functional status, which is especially important for polymorbid patients. However, at present, there are no clearly defined normative limits for the indicators of cardiopulmonary exercise testing for patients of older age groups, which determines the future prospects for studying the use of this method for patients over 60 years of age with various pathological conditions. KEYWORDS: aging, operational stress, adaptation, functional reserve, prognosis, age-related features, cardiopulmonary exercise testing. FOR CITATION: Trotsyuk D.V., Medvedev D.S., Zaripova Z.A., Chikov A.E. Risks of perioperative complications in patients of older age groups: causes, mechanisms and prognostic possibilities. Russian Medical Inquiry. 2021;5(3):150–155. DOI: 10.32364/2587-6821-2021-5-3-150-155.

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Age-associated processes combined with comorbidity affect the physiological reserves of patients of older age groups, having a negative impact on the surgery and the postoperative period. One of the most important geriatric syndromes, closely related to the treatment outcome in patients over 60, is frailty. The prevalence of frailty increases with age, and that is associated with a worsening of the perioperative prognosis, prolonged hospitalization, and an increase in mortality. The methods widely used for perioperative risk stratification do not take into account the presence and severity of frailty, changes in the functional state and reserve capabilities of the body, which reduces their sensitivity for patients of older age groups. The article considers the generally accepted approaches to risk stratification and identifies further development prospects in this area.