[Model of formation of chronic volume loading in the right heart].

The authors describe an experimental model for examining the changes occuring in the haemodynamics of the small circuit as a result of created artificial defect of the interatrial septum. An original operative technique is used, by which the complete clamping of the right lung artery and vera is avoided and lung complications are prevented. The performed control haemodynamic studies up to one vear after the operation support the efficiency of the proposed model.