[Use of spirometry and bicycle ergometry in the assessment of the stability of mitral valve bioprosthesis].

Muscular and cardiac performance was assessed a spirometry and bicycle ergometry in two groups of patients aged 25-55 with mitral xenobioprostheses functioning normally. 36 patients were examined 1-3 years following surgery (group I), 23 patients in 3.5-8 years.

[Evaluation of the function of mitral valve prosthesis by non-invasive methods].

The study was undertaken to examine the correlation between the parameters of central hemodynamics and mitral valve prosthesis functions which were obtained by invasive techniques, as well as these of physical working capacity, hemodynamics, and blood by noninvasive methods at rest and during bicycle ergometry in the graded exercise test. An examination was made of 24 patients every 0.5-8 years (mean 3.