Objective To investigate the risk factors of acute kidney injury（AKI）after onpump coronary artery bypass grafting(on-pump CABG) and off-pump coronary artery bypass grafting (off-pump CABG) in order to provide superior renal protective measure after operation. Methods The clinical data of 849 consecutive patients undergone coronary artery bypass grafting（CABG） in a single institution between January 1990 and August 2006 were retrospectively analyzed. A simplex module and a multivariate logistic regression model were constructed to identify risk factors for the development of AKI. Results AKI were occurred in 61 patients （11.8%，61/518） undergone off-pump CABG and 63 patients （19.0%，63/331） undergone onpump CABG. Peak of serum creatinine (Scr) after operation arrived at the 12th hour and 24th hour in patients undergone off-pump CABG and patients undergone on-pump CABG respectively. The rapidly recovering period of Scr in patients undergone off-pump CABG and on-pump CABG were from the 24th hour to the 48th hour and from the 48th hour to the 72th hour respectively.The results of the multivariate forward stepwise logistic regression analysis found that risk factors for the development of postoperative AKI following isolated CABG were associated with heavy body mass index（OR=1.190，1.179）, emergent procedure（OR=2.737，3.678）, diabetes（OR=1.705，2.042）, peripheral vascular disease（OR=2.002，2.559）,ejection fraction≤30%（OR=2.267，4.606）, and New York Heart Association(NYHA) class Ⅲ and Ⅳ（OR=1.861，1.957） were risk factors for the development of postoperative AKI following offpump and on-pump CABG; pulse pressure≥60mmHg and triplevessel disease were risk factors for the development of postoperative AKI following off-pump CABG. But perioperative and postoperative intra aortic balloon pumping (IABP) could make protective effect on kidney for on-pump CABG （OR=0.146）which could lessen development of AKI. Conclusions It is critical period for AKI that renal protection strategies should be performed from general anesthesia until postoperative 48 hours (off-pump CABG) and 72 hours (on-pump CABG). AKI might be the most important stage in which a positive test should increase the physician’s awareness of the presence of risk for renal injury and then preventive or therapeutic intervention could be performed when the situation still is reversible.
ObjectiveTo investigate the effect and significance of early coronary artery bypass graft (CABG) on the expression level of ionophorous protein at infracted border zone (IBZ) in dog with acute myocardial infarction. MethodsThe anterior descending coronary artery of all thirty healthy mongrel dogs were ligated into myocardial infarction model, whose successful criteria was that the regional myocardium supplied by ligated coronary artery became darker. Coronary artery bypass surgery performed at different time points after myocardial infarction (in the 1st week, the 2nd week, the 4th week, the 6th week respectively) was as an experimental group. While myocardial infarction without coronary artery bypass surgery was set up as a control group. Myocardial tissue without ligation of coronary artery was as a normal group. After 8 weeks, myocardial specimens were cut out in the experimental group and the control group. The local expression levels of ionophorous proteins such as Cav1.2, Kv4.3 and KchIP2 mRNA were detected by means of reverse transcription- polymerase chain reaction (RT-PCR) at normal myocardium and IBZ of the experimental group and the control group. ResultsFour dogs in every experimental group and all dogs in the control group survived to the end of the study. Three myocardial ion channel proteins expression in the control group were lower than those of the normal group or the experimental group significantly (P<0.01). Cav1.2 mRNA expression in the experimental group in the 4th week or the 6th week was lower than that in the normal group significantly (P<0.05). Kv4.3 and KchIP2 mRNA expression in the experimental group in the 4th week or the 6th week were lower than those in the normal group and the experimental group significantly in the 1st week or the 2nd week (P<0.05). ConclusionEarly CABG surgery for acute myocardial infarction could lessen the changes of expression level of ionophorous protein at infracted border zone (IBZ) of dog with acute myocardial infarction. Especially, CABG surgery among two weeks could improve expression level of ionophorous protein, and reduce the effect of ischemia for ionophorous protein and myocardial electrophysiology at IBZ.
ObjectiveTo identify the predictors of postoperative acute kidney injury in patients undergoing surgery for Stanford type A acute aortic dissection. MethodsA total of 220 patients who underwent surgery for type A acute aortic dissection in Qingdao Municipal Hospital from September 2010 to September 2017 were divided into two groups including a group A and a group B based on whether acute kidney injury occurred or not after surgery. There were 40 patients with 29 males and 11 females with the mean age of 54.6±9.2 years in the group A, 180 patients with 133 males and 47 females with the mean age of 48.5±7.9 years in the group B. Univariate and multivariate analyses (logistic regression) were used to identify the predictive risk factors.ResultsOverall in-hospital mortality was 5.5%. In univariate analysis, there were statistically significant differences with respect to the age, preoperative creatinine, preoperative white blood cell, the European system for cardiac operative risk evaluation (EuroSCORE), total cardiopulmonary bypass (CPB) time, deep hypothermic circulatory arrest (DHCA) time, arch replacement, red blood cell transfusion intraoperative and in 24 hours postoperatively, postoperative mechanical ventilation time, ICU stay duration, hospital stay duration and in hospital mortality. Multivariate logistic analysis showed that preoperative creatinine, preoperative white blood cell, CPB time, and red blood cell transfusion intraoperative and in 24 hours postoperatively were the independent predictors for postoperative acute kidney injury.ConclusionThe incidence of acute kidney injury is high after surgery for acute Stanford type A aortic dissection. It can be predicted based on above factors, for patients with these risk factors, more perioperative care strategies are needed in order to induce the incidence of acute kidney injury.
ObjectiveTo investigate the effect of postoperative use of levosimendan on patients with valve replacement.MethodPatients with valvular diseases who underwent valve replacement were prospectively enrolled during Jan 2014 to May 2018 in Qingdao Municipal Hospital, randomized to a levosimendan-treated group (n=93) and a control group (n=92) preoperatively. Patients in both groups underwent the same routine treatment preoperatively and postoperatively. In addition, patients in the levosimendan-treated group underwent levosimendan intravenous infusion 24 hours after entering ICU postoperatively. The clinical effect of the two groups was compared.ResultsCompared to the control group, the cardiac output(CO, 5.2±1.0 L/min vs. 4.4±1.1 L/min on the seventh day after surgery) and left ventricular ejection fraction (LVEF, 55.7%±2.5% vs. 50.5%±2.2% on the seventh day after surgery) of levosimendan-treated group were increased significantly at different time points(1 day, 3 days and 7 days after surgery)(P<0.05), and the brain natriuetic peptid (BNP) level (312.5±34.6 pg/ml vs. 455.4±45.2 pg/ml on the seventh day after surgery) was less than that of the control group (P<0.05). The dosage (11.5±1.8 mg/kg vs. 20.4±2.1 mg/kg) and administration time of vasoactive agents in the levosimendan-treated group were significantly lower or shorter than those in the control group (70.4±11.2 h vs. 110.5±12.1 h, P<0.05). The ICU stay length, and the total incidence of adverse events were less than those of the control group (P<0.05).ConclusionPostoperative use of levosimendan immediately after surgery can significantly improve the cardiac function status of patients who underwent valve replacement, reduce the dosage of vasoactive agents, shorten the time of ICU hospitalization, reduce the incidence of adverse events and enhance the patient’s recovery after valve replacement.
ObjectiveTo investigate the feasibility and safety of hybrid coronary revascularization (HCR) in patients with multivessel coronary artery disease (MVCAD).MethodsA total of 50 patients with MVCAD who underwent HCR technique in our heart center from May 2016 to April 2019 were included in this study (a HCR group), including 38 patients who underwent two-stage HCR and 12 patients one-stop HCR. There were 39 males and 11 females, with an average age of 62.4 (46-82) years. Another 482 patients who underwent conventional median incision under off-pump coronary artery bypass grafting (OPCAB) at the same period were selected as control (an OPCAB group), including 392 males and 90 females, with an average age of 64.2 (48-84) years. The safety and feasibility of HCR were evaluated and compared with conventional OPCAB technique.ResultsThere was no perioperative death in both groups. Compared with the OPCAB, HCR was associated with shorter operation time, less chest tube drainage, lower requirement of blood transfusion, shorter mechanical ventilation time and shorter postoperative intensive care unit (ICU) stay (P<0.05). There was no statistical difference in the incidence of major adverse cardiac or cerebrovascular events during the follow-up of 6 to 36 months between the two groups.ConclusionHCR provides favorable short and mid-term outcomes for selected patients with MVCAD compared with conventional OPCAB.
ObjectiveTo investigate the prognosis and impact of postoperative acute kidney injury (AKI) on patients with acute Stanford type A aortic dissection (ATAAD), and to analyze the predictors for short- and medium-term survival. MethodsClinical data of patients who underwent ATAAD surgery in Qingdao Municipal Hospital from May 2014 to May 2019 were retrospectively analyzed. All discharged patients underwent telephone or outpatient follow-up, and were divided into an AKI group and a non-AKI group based on whether AKI occurred after surgery. The impact of postoperative AKI on the short- and medium-term prognosis was analyzed, and multivariate Cox analysis was used to screen the risk factors for short- and medium-term mortality. ResultsA total of 192 patients were collected, including 139 males and 53 females, with an average age of 53.3±11.4 years. Postoperative AKI was identified in 43 (22.4%) patients. The average follow-up time of discharged patients was 23.4±2.4 months, and the lost rate was 5.1%. The two-year survival rate after discharge of the AKI group was 88.2%, and that of the non-AKI group was 97.2%. Kaplan-Meier survival analysis and log-rank test showed that there was a statistical difference between the two groups (χ2=5.355, log-rank P=0.021). Multivariate Cox analysis results showed that age (HR=1.070, 95%CI 1.026 to 1.116, P=0.002), cardiopulmonary bypass time (HR=1.026, 95%CI 1.003 to 1.050, P=0.026), postoperative AKI (HR=3.681, 95%CI 1.579 to 8.582, P=0.003), transfusion volume of red blood cell intraoperatively and within 24 hours postoperatively (HR=1.548, 95%CI 1.183 to 2.026, P=0.001) were independent risk factors for the short- and medium-term mortality of ATAAD patients. ConclusionThe incidence of postoperative AKI is high in ATAAD patients, and the mortality of patients with AKI increases significantly within two years. Age, cardiopulmonary bypass time and transfusion volume of red blood cell intraoperatively and within 24 hours postoperatively are also independent risk factors for short- and medium-term prognosis.