血清肌酐水平对急性心肌梗死患者预后的影响

目的评估血清肌酐增高对急性心肌梗死（AMI）患者临床及预后的影响。方法分析因AMI住院患者共340例,分为肌酐正常组269例,高肌酐组71例,随诊1年,观察并比较两组患者心源性休克、心力衰竭、心室颤动、Ⅲ度房室传导阻滞及30d病死率、住院病死率、随诊1年病死率的差异。结果高肌酐组患者年龄大、心肌梗死病史多;心源性休克、心力衰竭、心室颤动、Ⅲ度房室传导阻滞的发生率明显增加（P值分别为0．003、0．031、0．000、0．001）,30d病死率（32．39％比4．83％,P=0．000）、住院病死率（35．21％比5．20％,P=0．000）、1年病死率（43．66％比11．15％,P=0．000）都明显增高。Cox回归分析结果提示血清肌酐是30d死亡的独立危险因素（OR=4．591,95％CI2．149～9．808,P=0．000）,也是AMI1年死亡的独立危险因素（OR=3．936,95％CI2．264～6．845,P=0．000）。结论AMI患者血清肌酐水平增高30d病死率、住院病死率及1年病死率均明显增加;高血清肌酐是AMI预后的独立危险因素。

The impact of elevated serum creatinine on the prognosis of acute myocardial infarction

Objective To evaluate the clinical features and outcomes in patients suffering from acute myocardial infarction combined with elevated serum creatinine. Methods We enrolled 340 consecutive patients suffering from acute myocardial infarction admitted into our hospital from 2003. 2. 1-2004. 8. 31. The patients were divided into the following 2 groups, 269 patients in a group with normal serum creatinine and 71 patients in a group with elevated serum creatinine, according to the normal limit of serum creatinine in our hospital. Outcomes during hospitalization were available in all the patients and one year follow-up data were also available in all the patients. The influence of baseline demographic and clinical variables on mortality at day 30 and one year during the follow-up period was evaluated by Cox proportional hazard regression to determine the independent predictors of late adverse events. Results Elevated creatinine at baseline was present in 71 of the 340 patients. Compared with patients with normal creatinine, patients with elevated creatinine were older and more likely to have old myocardial infarction and to present with cardiac shock, heart failure, ventricular fibrillation and complete AVB. Mortality was markedly increased in patients with baseline elevated creatinine as compared with these without at day 30 (32. 39% versus 4. 83% , P = 0. 000) , during hospitalization (35. 21% versus 5. 20% , P = 0. 000) and at 1 year (43.66% versus 11. 15% , P =0.000). By Cox regression analysis, elevated creatinine was a powerful independent hazard predictor of 30-day survival (odds ratio 4.591, 95% confidence interval 2. 149 to 9. 808,P= 0. 000) and remained to be associated with reduced survival at 1 year (odds ratio 3. 936, 95% confidence interval 2. 264 to 6. 845, P = 0. 000). Conclusions Baseline elevated creatinine is associated with a markedly increased risk of 30-day death, death during hospitalization and mortality at one year in patients suffering from acute myocardial infarction and may be an independent risk factor of prognosis of acute myocardial infarction.