A descriptive study of perioperative hemodynamics in open cardiac surgery patients

Abstract Objectives The purpose of this study was to describe how perioperative hemodynamic profile before and after cardiopulmonary bypass during cardiac surgery is influenced by age, and to describe the association between postoperative hemodynamics and 1 year mortality. Design A retrospective registry-based study. Setting University Hospital of Aarhus, Denmark. Participants A total of 6545 patients undergoing elective on-pump cardiac surgery from 2006 to 2016. Measurements Perioperative hemodynamic values were derived from computerized anaesthesia and intensive care reports, including mean arterial pressure (MAP), cardiac index (CI), and oxygenation saturation from mixed venous blood in the pulmonary artery (SvO2), during the perioperative time. Perioperative hemodynamic values were stratified according to age. Logistic regression was applied to predict the crude probability of death within one year from surgery according to hemodynamic values at 6 hours post surgery, stratified by age and use of inotropic agents, respectively. Main results We found lower values for CI and SvO2 with increasing age, across all points in time in the perioperative course. Higher probability of death was associated with lower hemodynamic values in the postoperative phase, as well as the probability of death was modified by age, and the need of inotropic agents, respectively. Discussion This is a large registry based study describing the perioperative hemodynamic profile of patients undergoing cardiac surgery and the results enhance our understanding of age-differentiated values of CI and SvO2 in this specific population.