TYPES OF HEMODYNAMICS AND ASSOCIATIONS BETWEEN HEMODYNAMIC PARAMETERS AND BODY MASS INDEX IN MEDICAL STUDENTS

Abstract

The study goal was to investigate hemodynamic parameters in medical students with different types of hemodynamics and their relationship with the body mass index. Materials and methods. A cross-sectional study of 2- and 3-year students of the North-Ossetian State Medical Academy (NOSMA) (133 female and 37 male subjects) was performed. Blood pressure, pulse rate, and anthropometric variables were measured. Hemodynamic parameters and body mass index were calculated. Statistical processing included frequency and correlation analyses and analysis of variance. Results. Overall, 60.6%, 36.5%, and 2.9% of the subjects had a eukinetic, hypokinetic, and hyperkinetic type of hemodynamics, respectively. Stroke volume (74.1 (68.6; 79.4)), cardiac output (7.8 (7.6; 7.8)), heart rate (100.4 (96.5; 109.9)), pulse pressure (50.0 (45.0; 60.0)), and rate pressure product (103.5 (90.3; 113.1)) were the highest in the hyperkinetic type group, and the lowest values of stroke volume (55.2 (54.2; 60.6)), cardiac output (4.3 (4.1; 5.0)), and pulse pressure (39.0 (30.0; 40.0)) were reported in the hypokinetic type group. Correlations between the evaluated parameters and body mass index (r=0.17–0.46) have been established. In the hypokinetic and eukinetic type groups, CO, SBP, DBP, PP, RPP, and AP were higher in subjects with BMI ≥ 25 compared with those with BMI < 25. Conclusions. The eukinetic type of hemodynamics is the most common among medical students, and is predominantly inherent in females, while the hypokinetic type is more common among males. HR, SV, CI, CO, PP, RPP, KI increased and TPVR, RPVR, SBP, DBP, MBP decreased from the hypokinetic to hyperkinetic types. The observed within-group trends in the evaluated hemodynamic parameters were consistent with the types of hemodynamics both in female and male subjects. Regardless of the type of hemodynamics, the hemodynamic parameters and adaptation potential of the cardiovascular system decrease in subjects with BMI ≥ 25. Higher BMI was associated with a significantly greater cardiovascular load and AP of the cardiovascular system.