Background: Renal insufficiency in the acute coronary syndrome (ACS) is associated with poor cardiac outcome. In Asian populations, there are no data available for these associations.

Material and Method: Data was from the Thai ACS registry, only a new case of ACS. Clinical characteristics, treatment strategies, in-hospital mortality and 1-year mortality were compared for patients with normal or mild renal dysfunction (estimated glomerular filtration rate [eGFR] >60 ml/minute/1.73 m2, n = 809 [44.5%]), moderate renal dysfunction (eGFR 30-60 ml/minute/1.73 m2, n = 706 [38.9%]), and severe renal dysfunction (eGFR <30 ml/minute/1.73 m2, n = 301 [16.6%]).

Results: Of the 1,816 patients with mean follow-up 10.8 months, the mean age was 65 years, and 59.2 percent of the groups were male. Patients with severe renal dysfunction were significantly older, less likely to be male (45.2%, p<0.001) and had a greater prevalence of diabetes (63.1%, p<0.001) and hypertension (85.4%, p<0.001). In-hospital and 1-year mortality were 13.5% and 22.5% respectively. According to discharge diagnosis, unadjusted hazard ratios for overall in-hospital mortality was statistically significant only in ST elevation MI subgroup, hazard ratio was 2.73 (95% CI, 1.72 to 4.34) and 6.27 (95% CI, 3.78 to 10.4) for moderate and severe renal dysfunction group, respectively. The risk of death for all types of ACS at 1-year follow up increased when eGFR decreased below 60 ml/minute/1.73 m2, the adjusted hazard ratio was 1.66 (95% CI, 1.22 to 2.23) and 1.91 (95% CI, 1.34 to 2.72) for moderate and severe renal dysfunction group, respectively.

Conclusion: From Thai ACS registry, renal dysfunction at presentation is an independent predictor for the overall 1- year mortality and appeared to associate with an increase in hospital mortality in the subsets with STEMI.

Keywords:
Acute coronary syndrome registry, Renal dysfunction, Mortality