Comparison Of Cardiac Output Measured By Area Per Stroke Method And PiCCO In Patients With Intra-Aortic Balloon Pump After Coronary Artery Bypass Grafting

Objective: To evaluate the consistency of CO values measured by stroke volume method and PiCCO in patients with intra-aortic balloon pump after coronary artery bypass grafting(CABG).Methods: Twenty-seven patients with low cardiac output syndrome(LCOS)diagnosed by Pi CCO monitoring after CABG who were admitted to the Department of Intensive Care of our hospital from October 2018 to October 2019 and later treated with IABP adjuvant therapy were included as the study subjects.Heart rate,invasive mean arterial pressure,extravascular lung water,and systemic vascular resistance were recorded before IABP counterpulsation and at 2 h,4 h,8 h,12 h,and 24 h after IABP counterpulsation.CO values at the same time were measured using the stroke area method and PiCCO thermodilution technique,respectively.Results: The CO values calculated by each stroke area method were in good agreement with the CO values measured by PiCCO at each time point after the application of IABP,with no statistically significant difference(P>0.05).Conclusion: When peripheral resistance changes rapidly,PiCCO thermodilution technique is more accurate than area per stroke ratio method in calculating CO value.For patients with low cardiac output after CABG surgery using IABP,the use of PiCCO to monitor CO values should preferably be based on thermodilution technique measurements.