Purpose This study evaluated short- to intermediate-term outcomes in patients experiencing cardiac arrest following cardiac surgery, focusing on factors associated with survival to discharge. Method A retrospective audit was conducted on 78 patients at Monash Health (2010–2024), with a mean follow-up of 2.66±3.74 years (range 0–13.4). Survival associations were analysed using Kaplan-Meier curves and Cox regression. Primary outcomes were survival to discharge and one-year post-discharge. Secondary outcomes included post-arrest length of stay and mechanical support use. Results Out of 94 postoperative cardiac arrests in 78 patients, survival to discharge was 53% (41/78), and one-year survival was 38% (29/78). Post-arrest mechanical support was required in 7% (3/41) of survivors to discharge and 24% (9/37) of non-survivors, while additional open cardiac surgery was required in 24% (10/41) and 30% (11/37) respectively. Mean ICU and hospital lengths of stay post-arrest were 13.7±20.5 days and 28.3±28.8 days respectively. Significant associations between postoperative arrest and in-hospital mortality were operative age (HR 1.05, p=0.002), preoperative cardiovascular disease (HR 2.26, p=0.019), postoperative cerebrovascular events (HR 6.89, p=0.023), and chest reopening at time of arrest (HR 2.34, p=0.041). Conclusions One-year survival following cardiac arrest after cardiac surgery is low (38%). Mechanical support use post-arrest was higher in non-survivors to discharge, while reoperations were similar across groups. Preoperative cardiovascular disease, postoperative cerebrovascular events, and chest reopening at time of arrest significantly correlated with post-arrest mortality and may have prognostic implications.