The aim of the thesis is the evaluation of efficacy of surgical treatment for complex valvular heart diseases. An inclusion criterion to this analysis was the performance of a mitral valve replacement (MVR) and aortic valve replacement (AVR) for an artificial valve and a tricuspid valve replacement or plastic operation (TVR or pl. TV). Such operative procedures were carried out simultaneously. Twenty five operations were performed from 1995 to 1999. TVR was carried out in 2 patients, pl. TV in 21 patients and the Revuelt method was adopted for this purpose, whereas in two cases a tricuspid valve plastic operation was performed sewing in the annulus. In the two cases the revascularization of the right coronary artery was carried out simultaneously. In another case a myxoma removal from the left atrium was additionally carried out. One patient died due to renal failure during hospitalization on the 9th day after the operation. Three patients died subsequently in the first, second and third year after operation. The causes of subsequent deaths among the patients examined in the period of five years after the operation were thrombotic-embolic complications.
Conclusions: Early and subsequent results of simultaneous tri-valvular operations are good. The most frequent and difficult postoperative complication in this group of patients is a low output syndrome. Subsequent complications and deaths are most often due to thromboembolic complications, therefore a particular attention should be paid to the anticoagulant treatment in this group of patients.