[Acute disorders of the blood circulation and cardiac insufficiency following open heart surgery].

General theoretical aspects (classification of circulatory disorders and heart failure) and results of research into specific subdivisions of cardiovascular and respiratory system pathology in cardiac surgical patients are discussed. The material is aggregated by the applied clinico-mathematical approach that has been developed and introduced into clinical practice in the recent 15 years at the Bakulev Institute of Cardiovascular Surgery. The extension of the clinico-mathematical approach onto the intraoperative control and analysis of the patients' status, assessment of the anaesthetic administration and cardioplegic protection is first overviewed.