The study investigated the hemodynamic effects of red blood cell transfusion in 26 patients (9 women, 17 men, mean age 73 years) with hemato-oncological diseases. The initial hemoglobin of the patients was 7.8 g/dL. After the transfusion, the heart rate dropped significantly from 81 to 74 beats per minute. Blood pressure increased in the brachial artery (systolic from 123 to 128 mmHg, diastolic from 62 to 64 mmHg) and in the aorta (systolic from 101 to 109 mmHg). The augmentation index adjusted to 75 beats per minute increased from 11 to 18 percent. The study found trends toward improvements in blood rheology and vascular function, although these changes were not statistically significant. The authors note that these immediate hemodynamic effects appear to be beneficial, but further research is needed to determine long-term outcomes, particularly in patients requiring frequent transfusions.