[Long-term results of mitral valve prosthetics depending on the prosthesis model (ball, disk)].

The authors conducted a comparative analysis of patients of 2 groups--with a MK4 model ball prosthesis and an folding disc prosthesis. It was found that the number of late-term (repeated) thromboembolic complications was significantly less in patients with a disc prosthesis (3.95 cases per 100 patient-years) and 4.

[Effects of indices of the test-system "age--normal antibodies--leukocytes--lymphocytes" on immunological parameters under the action of cancer risk factors].

It is established that application of the test-system "age-normal antibodies-leucocytes-lymphocytes" permits refusing in certain cases from the generally-accepted laboratory immunological tests and prognosticate their values depending on the test-system indices when using the regression models. The great incongruity of the predicted and real values of the concrete immunological index may be the manifestation of the risk factors associated with the oncological and other diseases.

[Causes of decreased stability of good survival results and the incidence of complications in patients with multiple heart valve prostheses].

The results of six-year follow-up of 368 patients after multiple prosthetic valve implantation (mitral and aortic prostheses in 173, mitral and tricuspid prostheses in 129, three prostheses in 36, mitral and aortic prostheses with tricuspid annuloplasty in 30) are reviewed. The mean functional class was 4.05 prior to the operation, and eventually declined to 2.