No abstract

Background Hemodynamic changes are among the common complications after coronary artery bypass graft (CABG) surgery. Incentive spirometry and deep breathing exercises are widely used in patients undergoing coronary artery bypass graft surgery. The aim of the present study was to compare the effect of incentive spirometry and deep breathing exercises on hemodynamic parameters of patients undergoing coronary artery bypass graft surgery. Methods This is a clinical trial that was performed on 40 heart patients who were candidates for coronary artery bypass graft surgery. Participants were selected using convenience sampling and then randomly divided into two groups. One day before surgery, one group was taught how to perform deep breathing exercises (DBE) and the other group was taught how to use incentive spirometry in practice. Hemodynamic indices were measured and recorded before the intervention, the first, second, and the third day after the intervention. Data analysis was carried out using SPSS ver.16 and descriptive and inferential statistical tests. Findings: The mean systolic blood pressure (SBP) and diastolic blood pressure (DBP) on the first day after the intervention in patients undergoing the incentive spirometry group was significantly higher than the DBE group (p < 0.05). On the third day after the intervention, the mean arterial SaO2 in patients of the incentive spirometry group was significantly higher than the DBE group and the mean respiratory rate (RR) in patients in the incentive spirometry group was significantly lower than the DBE group (p < 0.05). However, there was no significant difference between the two groups in terms of other indices (p > 0.05). Conclusion The results showed that incentive spirometry has a greater effect on hemodynamic indices of patients undergoing CABG compared to DBE, so, it is recommended to use incentive spirometry to improve hemodynamic indices in these patients. Trial registration: Iranian Registry of Clinical Trials (IRCT), IRCT20191028045267N1. Registered 12 March 2020, https://www.irct.ir/trial/43365