Preoperative Use Of Intra-aortic Balloon Pump Research Articles

Preoperative intra-aortic balloon pump in patients with ST-elevation myocardial infarction undergoing urgent cardiac bypass surgery.

In patients with ST-elevation myocardial infarction (STEMI), either with or without cardiogenic shock, mechanical circulatory support with an intra-aortic balloon pump (IABP) is not associated with lower mortality. However, in STEMI patients undergoing urgent coronary artery bypass grafting (CABG), preoperative insertion of an IABP has been suggested to reduce mortality. In this study, the effect of preoperative IABP use on mortality in STEMI patients undergoing urgent CABG was investigated. All consecutive STEMI patients undergoing urgent CABG in asingle centre between 2000 and 2018 were studied. The primary outcome, 30-day mortality, was compared between patients with and without apreoperative IABP. Subgroup analysis and multivariable analysis using apropensity score and inverse probability treatment weighting were performed to adjust for potential confounders. Atotal of 246 patients were included, of whom 171 (69.5%) received apreoperative IABP (pIABP group) and 75 (30.5%) did not (non-pIABP group). In the pIABP group, more patients suffered from cardiogenic shock, persistent ischaemia and reduced left ventricular function. Unadjusted 30-day mortality was comparable between the pIABP and the non-pIABP group (13.3% vs 12.3%, p = 0.82). However, after correction for confounders and inverse probability treatment weighting preoperative IABP was associated with reduced 30-day mortality (relative risk 0.52, 95% confidence interval 0.30-0.88). In patients with STEMI undergoing urgent CABG, preoperative insertion of an IABP is associated with reduced mortality.

Impact of preoperative intra-aortic balloon pump on outcomes in coronary artery bypass grafting for unprotected left-main coronary artery disease.

Preoperative intra-aortic balloon pump (IABP) before coronary artery bypass grafting (CABG) could improve operative outcomes by augmenting the diastolic coronary blood flow. Data on preoperative IABP use in patients with left-main coronary artery (LMCA) disease are limited. This study aimed to characterize patients who received preoperative IABP before CABG for LMCA and evaluate its effect on postoperative outcomes. This multicenter retrospective cohort study that included consecutive 914 patients who underwent CABG for unprotected LMCA disease from January 2015 to December 2019 in 14 tertiary referral centers. Patients were grouped according to the preoperative IABP insertion into patients with IABP (n=101) and without IABP (n=813). Propensity score matching adjusting for preoperative variables, with 1:1 match and a caliber of 0.03 identified 80 matched pairs. The primary outcomes used in propensity score matching were cardiac mortality and major adverse cardiac and cerebrovascular events (MACCE). IABP was commonly inserted in patients with previous myocardial infarction (MI), chronic kidney disease, peripheral arterial disease, and congestive heart failure. IABP patients had higher EuroSCORE [ES >8%: 95 (11.86%) vs. 40 (39.60%), P<0.001] and SYNTAX {29 [interquartile range (IQR) 25-35] vs. 33 (IQR 26-36); P=0.02} scores. Preoperative cardiogenic shock and arrhythmia were more prevalent in patients with IABP, while acute coronary syndrome was more prevalent in patients without IABP. After matching, there was no difference in vasoactive inotropic score between groups [3.5 (IQR 1-7.5) vs. 6 (IQR 1-13.5), P=0.06], and lactate levels were nonsignificantly higher in patients with IABP [2.4 (IQR 1.4-4.5) vs. 3.1 (IQR 1.05-7.75), P=0.05]. There were no differences between groups in acute kidney injury [20 (25%) vs. 26 (32.5%), P=0.34], cerebrovascular accidents [3 (3.75%) vs. 4 (5%), P>0.99], heart failure [5 (6.25%) vs. 7 (8.75%), P=0.75], MI [7 (8.75%) vs. 8 (10%), P>0.99], major adverse cardiac and cerebrovascular events [10 (12.5%) vs. 17 (21.25%), P=0.21], and cardiac mortality [6 (7.50%) vs. 14 (17.50%), P=0.09]. Patients who received IABP had longer ventilation times [8.5 (IQR 6-23) vs. 15.5 (IQR 5-50.5) h, P=0.03] and intensive care unit (ICU) stays [3 (IQR 2-5) vs. 4 (IQR 2-7.5) days, P=0.01]. Preoperative IABP in patients with LMCA might not be associated with reduced cardiac mortality or hospital complications. IABP could increase the duration of mechanical ventilation and ICU stay, and its use should be individualized for each patient.

Outcomes of Patients Presenting With Non-ST Elevation Myocardial Infarction Who Underwent Surgical Revascularization

Non-ST-segment elevation myocardial infarction (NSTEMI) is a leading cause of emergency hospitalisation across Europe. This study evaluates the in-hospital and mid-term outcomes of patients undergoing coronary artery bypass grafting (CABG) following NSTEMI. A retrospective analysis of all cases undergoing isolated CABG following NSTEMI from September/2017 to September/2022 at our Centre. Patients were stratified according to in-hospital survival. Patient characteristics, operative details, and procedural complications were compared between those who survived and those who did not. Predictors of in-hospital and mid-term mortality were evaluated using logistic and Cox regression modelling. Kaplan Meier analysis was used to generate a survival curve for all alive patients at the time of discharge. Among 1011 patients (median age 64 [56 - 72] years, 852 [84.3%] male), 735 (72.7%) underwent urgent, 239 (23.6%) elective, and 37 (3.7%) emergency CABG. The in-hospital mortality was 1.5% (15/1011 patients). Those who died were more likely to be NYHA class III/IV, have LVEF <21%, severe renal impairment, peripheral vascular disease (PVD), or poor mobility. Emergency procedures, pre-operative ventilation, inotropic support, and intra-aortic balloon pump (IABP) use were also more prevalent among those who died. Logistic regression modelling revealed new postoperative stroke (OR:22.0; 95% CI:3.6-135.5; p=0.001), pre-operative IABP use (11.4; 2.4-53.7; p=0.002), new haemodialysis (9.6; 2.7-34.7; p<0.001), PVD (5.6; 1.6-20.0; p=0.008), and poor mobility (OR: 4.8; 95% CI: 1.3-18.2; p=0.022) as independent predictors of in-hospital mortality. In conclusion, new postoperative stroke, pre-operative IABP use, new haemodialysis, PVD and poor mobility are independent predictors of mortality in NSTEMI patients undergoing isolated CABG.

Blood perfusion status is important in the prognosis of ventricular aneurysm complicated by ventricular septal rupture.

Due to its low incidence, poor prognosis, and high mortality in the acute phase, the long-term prognosis of the left ventricular aneurysm (LVA) complicated by ventricular septal rupture (VSR) has received little attention. This study focus on the long-term prognosis of patients with LVA complicated by relatively stable VSR. Over a decade of retrospection, 68 patients with both LVA and VSR were compared with 136 patients with LVA alone after propensity score matching. Patients with both LVA and VSR were further divided into two groups depending on whether pre-operative intra-aortic balloon pump (IABP) was used (23 pre-operative IABP vs. 45 non-pre-operative IABP). The primary endpoint was defined as major adverse cardiovascular and cerebrovascular events, a composite endpoint including mortality, myocardial infarction, revascularization, stroke, and heart failure. Patients with both LVA and VSR were generally in a worse condition upon admission compared with those with LVA alone [percentage of patients in New York Heart Association IV: 42.6% (29/68) vs. 11.0% (15/136), P<0.001]. Both pre-operative and post-operative IABP use rates were significantly higher in patients with both LVA and VSR than in patients with LVA alone [pre-operative IABP use rates: 33.8% (23/68) vs. 0.74% (1/136), P<0.001 and post-operative IABP use rates: 33.8% (23/68) vs. 10.3% (14/136), P<0.001]. No significant difference was observed in the primary endpoint between patients with both LVA and VSR and those with LVA alone (log-rank test, P=0.63, median follow-up time 63months). We further investigated the effect of pre-operative IABP on the long-term prognosis of patients with both LVA and VSR. Patients who applied pre-operative IABP had a worse long-term prognosis than those who did not (log-rank test, P=0.0011). The long-term prognosis of LVA combined with VSR was not inferior than LVA alone after surgery, but poor blood perfusion status was associated with a worse prognosis.

Waitlist Trends in Heart-Liver Transplantation With Updated US Heart Allocation System

BackgroundIn October 2018, the United States implemented a change in the donor heart allocation policy from a three-tiered to a six-tiered status system. The purpose of the current study was to examine changes in waitlist patterns among patients listed for concomitant heart-liver transplantation with implementation of the new allocation system. MethodsPatients listed for heart-liver transplantation between January 1, 2012, and June 30, 2021, were identified from the United Network for Organ Sharing database. Patients were grouped by era according to initial list date before or after October 18, 2018. Competing risks regression for mortality, transplantation, removal from waitlist due to illness was performed according to the method of Fine and Gray. Waitlist data were censored at 3 years from initial listing. ResultsOverall, 523 patients were identified, of whom 310 were listed before (era 1, 59%) and 213 after (era 2, 41%) allocation change. Patients in era 1 were older, had more restrictive cardiomyopathy, and more preoperative inotrope use (all P < .05). However, patients in era 2 has longer ischemic times (3.5 ± 1.1 vs 3.1 ± 1.1 hours, P < .01) and more intraaortic balloon pump use (8.9% vs 3.9%, P = .016). Era 2 was associated with lower subdistribution hazard for death (hazard ratio 0.37; 95% CI, 0.13-1.02; P = .054) and increased transplantation (hazard ratio 1.35; 95% CI, 1.06-1.72; P = .015). ConclusionsThe implementation of the US donor heart allocation policy was associated with more preoperative intraaortic balloon pump use for patients listed for heart-liver transplantation. Despite that, the modern era was associated with lower waitlist mortality and more frequent transplantation, without increased risk of delisting due to illness.

Surgical treatment of post-infarction papillary muscle rupture: systematic review and meta-analysis.

Papillary muscle rupture (PMR) is a rare but potentially fatal complication following acute myocardial infarction (AMI). Surgical treatment is considered the standard of care. This systematic review and meta-analysis aims to evaluate the early outcomes after surgical correction of post-AMI PMR. Electronic databases were searched from January 1990 to December 2020. Studies reporting patients undergoing mitral valve surgery for post-AMI PMR were analysed. The primary outcome assessed was operative mortality. Differences were expressed as risk ratio (RR) with 95% confidence interval (CI) to assess the relationships between predefined surgical variables and clinical prognosis. A total of 1,851 adult patients, from 12 observational studies, were identified. Operative mortality was 21%. Meta-analysis revealed reduced operative risk in patients undergoing mitral valve repair (MVr) as compared to replacement (MVR) (RR, 0.33; 95% CI: 0.14 to 0.79; P=0.01), and an increased risk of operative mortality in patients with complete PMR (RR, 2.54; 95% CI: 1.12 to 5.74; P=0.03). No significant differences in terms of operative mortality were observed between patients with or without pre/peri-operative intra-aortic balloon pump (IABP) support and between subjects who underwent mitral valve surgery with or without concomitant coronary artery bypass grafting (CABG). Mitral valve surgery for post-AMI PMR carries a high operative mortality. Patients with complete PMR and subjects undergoing MVR have increased risks of operative mortality. The preoperative use of IABP and concomitant CABG seem not to influence the early postoperative course in this context.

Trends and Outcomes of Surgical Reexploration After Cardiac Operations in the United States

BackgroundSurgical reexploration after cardiac surgery has been associated with increased in-hospital complications and mortality in limited series. The present study examined trends in reoperation and the impact of reoperation on clinical outcomes and resource use in a nationally representative cohort. The study sought to determine patient and hospital factors associated with reexploration and reoperative mortality, defined as failure to rescue surgical (FTR-S). MethodsAdult hospitalizations entailing cardiac operations (coronary artery bypass or valve) were identified using the 2005 to 2018 National Inpatient Sample. Procedures were tabulated using International Classification of Diseases codes. Hospitals were ranked into tertiles according to risk-adjusted mortality, with the lowest stratified as high performing. Multivariable regression models examined factors associated with reexploration, as well as clinical outcomes, including FTR-S and resource use. ResultsOf an estimated 3,490,245 hospitalizations, 78,003 (2.23%) required reexploration with decreasing incidence over time. Valvular procedures, preoperative intraaortic balloon pump use, and liver disease were associated with a greater likelihood of reexploration. Reoperation was associated with increased odds of mortality (adjusted odds ratio [AOR], 3.86; 95% confidence interval [CI], 3.61 to 4.12), perioperative complications, and resource use. Increasing time from index operation to reexploration was associated with higher odds of mortality (AOR,1.10/day; 95% CI, 1.07 to 1.12). High-performing hospitals were associated with lower odds of reexploration (AOR, 0.88; 95% CI, 0.82 to 0.95) and FTR-S (AOR, 0.29; 95% CI, 0.23 to 0.35). ConclusionsSurgical reexploration after cardiac surgery has declined over time. High-performing hospitals demonstrated lower rates of reexploration and subsequent FTR-S. Although unable to identify specific practices, this study highlights the presence of significant variation in takeback rates, and further study of underlying factors is warranted.

Preoperative Use of Intra-Aortic Balloon Pump Support Reduced 30-Day Mortality in a Population with LVEF >35% and High Surgical Risk after Coronary Artery Bypass Graft Surgery

Introduction: The intra-aortic balloon pump (IABP) is used to prevent complications after coronary artery bypass grafting (CABG) surgery, although some results are controversial and basal ventricular function may play a role. This study assessed the benefit of preoperative use of IABP, as stratified by the ventricular function, in a population submitted to high-surgical-risk CABG. Methods: Patients >18 years old, with multiple coronary artery disease and thus candidates for CABG, were included. Cardiogenic shock, acute myocardial infarction (AMI), acute ventricle mechanical dysfunction, severe aortic regurgitation, tachyarrhythmia, massive pulmonary embolism, coagulopathy, or low life expectancy were exclusion criteria. Results: One hundred and twenty-nine patients aged 65 years old with hypertension, dyslipidemia, type 2 diabetes mellitus, and mean left ventricular ejection fraction (LVEF) 46% constituted the study population. No difference was observed at 30-day mortality endpoint (IABP vs. no IABP, 17 vs. 24%, OR 0.63, p = 0.20; AMI 25 vs. 31%, OR 0.75, p = 0.29). After LVEF stratification, the subgroup of 48 (75%) patients under IABP support and LVEF >35% had a reduced 30-day mortality risk (LVEF ≤35% vs. LVEF >35%, 37.5 vs. 10.4%, OR 0.3, p = 0.03), independently from potential confounders and showing an interaction with European System for Cardiac Operative Risk Evaluation-II (EuroSCORE-II). At secondary endpoints, IABP use was associated with a lower prevalence of acute renal failure and renal replacement therapy, but with a longer stay in the intensive care unit and longer hospitalization time. Conclusion: The preoperative use of IABP was associated with an independent reduction of 30-day mortality risk in cases with LVEF >35% in a population submitted to high-surgical-risk CABG. Likewise, the use of IABP was associated with a lower risk of postoperative renal complications.

Outcomes with intra-aortic balloon pump in high risk cardiac surgery patients

ABSTRACT Introduction: In high-risk cardiac surgical patients the intra-aortic balloon pump (IABP) is the most frequent used tool for temporary mechanical circulatory support during the perioperative phase. The effects of IABP are an increase in diastolic blood pressure, an improvement in coronary perfusion and a reduction of ventricular afterload, so it increases the stroke volume and cardiac output. Objective: To study the effect of preoperative use of intra-aortic balloon pump (IABP) on the outcome of high-risk patients that were subjected to coronary artery bypass graft (CABG) surgery. Methods: From June 2009 to June 2011. Group of 100 patients considered as high-risk patients were subjected to elective bypass cardiac surgery at our center. Forty patients subjected to preoperative IABP as a prophylactic measure and 60 patients were not subjected to IABP. This is retrospective study of prospectively collected data .The definition of High risk was the presence of two or more known risk factors. The patient’s outcome is compared regarding the predicted mortality of the Euro SCORE. The preoperative effect of IABP on the outcome, mortality and 30 days follow-up was statistically analyzed. Results: Forty patients subjected to preoperative IABP as prophylactic measure due to higher Euro SCORE-predicted mortality than other 60 patients did not subject to IABP(60% vs 40 %, P = ˂0.05). Seventy patients (70%) were male while (30%) were female with a mean age of 58.62 ± 9.65 years. Patients subjected to preoperative IABP had increased a percentage of hospital mortality (P = ˂0.05) but this percentage is relatively lower than predicted by Euro SCORE. Patients subjected to preoperative IABP had lower rate of postoperative complication (acute kidney insult (P = 0.045), cardiac surgical intensive care unit (CSICU) stay (P = 0.032) and decrease the need for postoperative inotrope (P = 0.046)) compared to patients without preoperative IABP use. Other complications postoperative were low and similar in both groups. Conclusions: We conclude that patients have high-risk CABG, the preoperative IABP in this group with higher predicted mortality was associated with a relative reduction than predicted by Euro score. The preoperative IABP in this group has a reliable and acceptable outcome on postoperative complications. Keywords: intra-aortic balloon pump, High Risk, Cardiac Surgery

Deep sternal wound infection after bilateral internal thoracic artery grafting: Insights from a Japanese national database

ObjectivesDespite its survival benefits, bilateral internal thoracic artery (BITA) grafting is not commonly utilized due to concerns over deep sternal wound infection (DSWI). The present study investigated the early outcome of BITA grafting and analyzed the risk of DSWI using a Japanese national database (the Japan Adult Cardiovascular Surgery Database). MethodsData from 560 hospitals were used. Between April 2012 and December 2015, BITA was harvested in 14,249 patients, corresponding to 32.6% of isolated coronary artery bypass cases. DSWI was defined as a wound infection requiring surgical intervention and/or the administration of antibiotics. Multiple logistic regression analysis was employed to model the risk of DSWI. ResultsThe mean age was 67.1 years. The prevalence of diabetes, renal failure, hemodialysis, and liver dysfunction was 51.8%, 21.2%, 7.8%, and 1.2%, respectively. The incidence of DSWI and operative mortality was 1.6 (234 patients) and 1.6% (226 patients), respectively. The operative mortality rate in patients with DSWI was 13.7% (32 patients). The off-pump technique was used in 72.8%, with a conversion rate of 2.5%. Female sex, diabetes mellitus, chronic lung disease, renal failure, liver dysfunction, ejection fraction ≤60%, shock status, reoperation, preoperative intra-aortic balloon pump use, and an increased operative time were independent risk factors for DSWI after BITA grafting. The off-pump technique did not reduce the risk of DSWI. ConclusionsThe present study showed that early outcomes of BITA grafting were satisfactory regarding DSWI and operative mortality. The current data are informative to predict the risk of DSWI when performing BITA grafting.

OUTCOMES WITH INTRA-AORTIC BALLOON PUMP IN HIGH RISK CARDIAC SURGERY PATIENTS

ABSTRACT Introduction: In high-risk cardiac surgical patients the intra-aortic balloon pump (IABP) is the most frequent used tool for temporary mechanical circulatory support during the perioperative phase. The effects of IABP are an increase in diastolic blood pressure, an improvement in coronary perfusion and a reduction of ventricular afterload, so it increases the stroke volume and cardiac output. Objective: To study the effect of preoperative use of intra-aortic balloon pump (IABP) on the outcome of high-risk patients that were subjected to coronary artery bypass graft (CABG) surgery. Methods: From June 2009 to June 2011. Group of 100 patients considered as high-risk patients were subjected to elective bypass cardiac surgery at our center. Forty patients subjected to preoperative IABP as a prophylactic measure and 60 patients were not subjected to IABP. This is retrospective study of prospectively collected data .The definition of High risk was the presence of two or more known risk factors. The patient’s outcome is compared regarding the predicted mortality of the Euro SCORE. The preoperative effect of IABP on the outcome, mortality and 30 days follow-up was statistically analyzed. Results: Forty patients subjected to preoperative IABP as prophylactic measure due to higher Euro SCORE-predicted mortality than other 60 patients did not subject to IABP(60% vs 40 %, P = ˂0.05). Seventy patients (70%) were male while (30%) were female with a mean age of 58.62 ± 9.65 years. Patients subjected to preoperative IABP had increased a percentage of hospital mortality (P = ˂0.05) but this percentage is relatively lower than predicted by Euro SCORE. Patients subjected to preoperative IABP had lower rate of postoperative complication (acute kidney insult (P = 0.045), cardiac surgical intensive care unit (CSICU) stay (P = 0.032) and decrease the need for postoperative inotrope (P = 0.046)) compared to patients without preoperative IABP use. Other complications postoperative were low and similar in both groups. Conclusions: We conclude that patients have high-risk CABG, the preoperative IABP in this group with higher predicted mortality was associated with a relative reduction than predicted by Euro score. The preoperative IABP in this group has a reliable and acceptable outcome on postoperative complications. Keywords: intra-aortic balloon pump, High Risk, Cardiac Surgery

Short-term outcomes of preoperative intra-aortic balloon pump use in patients undergoing adjunctive coronary endarterectomy: a retrospective observational study.

Coronary artery bypass grafting (CABG) combined with coronary endarterectomy (CE) can be associated with high operative mortality and morbidity. An intra-aortic balloon pump (IABP) has been the most widely used mechanical circulatory support device during perfusion treatment. However, the benefits of preoperative IABP in CABG combined with CE remain unknown. We conducted a retrospective observational study to evaluate the efficacy of preoperative IABP therapy in patients undergoing adjunctive right coronary artery (RCA) endarterectomy. Between May 2013 and May 2016, 120 patients undergoing off-pump coronary artery bypass grafting (OPCABG) with RCA endarterectomy who received preoperative IABP support (IABP group, n=56) or who did not receive preoperative IABP support (control group, n=64) were evaluated retrospectively. Patients in the IABP group had a significantly lower mean preoperative ejection fraction and a significantly higher mean EuroSCORE (both <0.05). The incidence of inferior myocardial infarction (MI) was significantly lower in the IABP group than in the control group (3.6% vs 15.6%, RR = 0.23, 95% CI 0.05-1.00, p=0.03). Hospital mortality was similar in the two groups (3.6% vs 4.7%, RR= 0.76, 95% CI 0.13-4.40, p=0.76). There were no significant differences between the two groups with respect to the rates of prolonged ventilation, low cardiac output syndrome, renal failure requiring dialysis, re-operation for bleeding or IABP-related complications. Preoperative IABP may be a protective factor of inferior MI (HR = 0.031, 95% CI 0.004-0.211, p<0.001) Conclusions: The preoperative use of IABP could reduce the incidence of postoperative MI in patients undergoing CABG with CE and seemed to shift high-risk patients into a lower-risk category.

Preoperative Intra-Aortic Counterpulsation in Cardiac Surgery: Insights From a Retrospective Series of 588 Consecutive High-Risk Patients

To support a rational use of preoperative intra-aortic balloon pump (IABP) in cardiac surgery. Retrospective, observational study. Single university hospital. The study included 588 (mean age 68.5 ± 9.6 yr) consecutive patients who received IABP before cardiac surgery from 1999 to 2016. Coronary surgery was performed in 573 (97.4%) cases. IABP indications were prophylaxis (n = 147), unstable angina (n = 239), and rapid worsening of hemodynamics (n = 202). Baseline characteristics of patients were analyzed with multivariable methods. Comparison of outcomes postsurgery between 74 patients undergoing IABP because of left main coronary artery disease (LMCAD) (stenosis ≥ 50%) and a new series of 1,360 patients experiencing LMCAD but who did not receive an IABP using propensity-score matching. Throughout the study period, the rate of IABP use for prophylaxis and unstable angina increased (p = 0.0029) despite reduction in patient surgical risk (p = 0.0051). Early period of surgery (p = 0.032), rapid worsening of hemodynamics in the operating room (p = 0.0029), renal impairment (p < 0.0001), and ventilation before surgery (p = 0.0032) were predictors of in-hospital mortality. The cumulative rate of IABP-related complications was 6.8%. Current smoking (p = 0.025) and the use of a 9 Fr catheter (p = 0.0017) were predictors of IABP-related vascular complications. No difference was found regarding outcomes postsurgery for 43 pairs of IABP/non-IABP matched patients with LMCAD, even though preoperative IABP was associated with an increased use of bilateral internal thoracic artery grafting. Preoperative use of IABP in cardiac surgery was shown in this study to be safe, even for high-risk patients. LMCAD is not by itself a sufficient indication for prophylactic IABP.

Preoperative intra-aortic balloon pump use in high-risk patients prior to coronary artery bypass graft surgery decreases the risk for morbidity and mortality-A meta-analysis of 9,212 patients.

Prophylactic intra-aortic balloon pump (IABP) support for high-risk patients before coronary artery bypass grafting (CABG) is controversial. This meta-analysis sought to determine the current role of preoperative IABP support. We performed a meta-analysis of randomized (RCT) and observational trials (OT) that fulfilled the following criteria: (1) Group comparison of patients with prophylactic IABP implantation before CABG with a control group; (2) reporting at least one desired clinical endpoint, including all-cause mortality, myocardial infarction, cerebrovascular accident (CVA), and renal failure. Pooled treatment effects (odds ratio [OR] or weighted mean difference, and 95% confidence intervals [95%CI]) were assessed using a fixed or random effects model. A total of 9,212 patients from 23 studies (7 RCT, 16 OT) were identified after a literature search of major databases using a predefined keyword list. Absolute risk reduction for mortality in RCTs was 4.4% (OR 0.43; 95%CI 0.25-0.73; p = 0.0025). Prophylactic IABP use before CABG surgery also decreased the risk for myocardial infarction (OR 0.58; 95%CI 0.43-0.78; p = 0.004), CVA (OR 0.67; 95%CI 0.47-0.97; p = 0.042), and renal failure (OR 0.62; 95%CI 0.47-0.83; p = 0.0014). Length of intensive care unit stay (p < 0.0001) and length of hospital stay (p < 0.0001) were significantly reduced in patients with preoperative IABP use. Current evidence from RCT and OT suggests beneficial effects for the IABP in high-risk patients before CABG surgery.

Modern hydroxyethyl starch and acute kidney injury after cardiac surgery: a prospective multicentre cohort

BackgroundRecent trials have shown hydroxyethyl starch (HES) solutions increase the risk of acute kidney injury (AKI) in critically ill patients. It is uncertain whether these adverse effects also affect surgical patients. We sought to determine the renal safety of modern tetrastarch (6% HES 130/0.4) use in cardiac surgical patients. MethodsIn this multicentre prospective cohort study, 1058 consecutive patients who underwent cardiac surgery from 15th September 2012 to 15th December 2012 were recruited in 23 Spanish hospitals. ResultsWe identified 350 patients (33%) administered 6% HES 130/0.4 intraoperatively and postoperatively, and 377 (36%) experienced postoperative AKI (AKI Network criteria). In-hospital death occurred in 45 (4.2%) patients. Patients in the non-HES group had higher Euroscore and more comorbidities including unstable angina, preoperative cardiogenic shock, preoperative intra-aortic balloon pump use, peripheral arterial disease, and pulmonary hypertension. The non-HES group received more intraoperative vasopressors and had longer cardiopulmonary bypass times. After multivariable risk-adjustment, 6% HES 130/0.4 use was not associated with significantly increased risks of AKI (adjusted odds ratio 1.01, 95% CI 0.71–1.46, P=0.91). These results were confirmed by propensity score-matched pairs analyses. ConclusionsThe intraoperative and postoperative use of modern hydroxyethyl starch 6% HES 130/0.4 was not associated with increased risks of AKI and dialysis after cardiac surgery in our multicentre cohort.

Efficacy and safety of preoperative intra-aortic balloon pump use in patients undergoing cardiac surgery: a systematic review and meta-analysis

BackgroundIntra-aortic balloon pump (IABP) can be used prior to coronary artery bypass graft surgery (CABG) in high-risk patients. Whether this technique remains safe and effective in contemporary practice is controversial. ObjectiveWe have completed a systematic review and meta-analysis of randomized trials and observational studies to evaluate the safety and benefits of IABP prior to CABG surgery. MethodsWe searched PubMed, EMBASE, Cochrane Library databases, with cross-referencing of relevant articles for studies assessing the impact of IABP prior to and after isolated CABG. Two investigators independently sorted the potentially relevant studies, and three extracted data. The assessed outcomes included in-hospital and 30-day mortality, IABP-related complications and length of intensive care unit and hospital stay. ResultsFrom 1977 to 2015 we included 11 randomized controlled trials (n=1293) (RCTs) and 22 observational studies, including a total of 46,067 patients. Analyses from RCTs suggested that IABP prior to CABG was associated with a significant reduction in hospital mortality (odds ratio (OR) 0.20; 95% confidence interval (CI): 0.09–0.44; P<0.0001) and 30-day mortality compared to no preoperative IABP (OR 0.43, 95% CI: 0.25–0.76; P=0.003). IABP prior to CABG was also associated with shorter intensive care unit (weighted mean difference (WMD) −1.47day; 95% CI: −1.82 to −1.12day; P<0.00001) and hospital length of stay (WMD −3.25days; 95% CI: −5.18 to −1.33days; P=0.0009). However, there were significant bias and limitations among included studies. Furthermore, results for similar outcomes from observational studies remained inconclusive. ConclusionsIn contemporary practice, evidence showing clinical benefit for preoperative IABP in high-risk patients remains limited and requires further validation in an appropriately sized multicenter randomized trial.

CLINICAL OUTCOMES IN ACUTE CORONARY SYNDROME PATIENTS FOLLOWING CORONARY ARTERY BYPASS GRAFTING IN RELATION TO TIMING OF TICAGRELOR DISCONTINUATION: INSIGHTS FROM THE CAPITAL REGISTRY

Patients with acute coronary syndromes (ACS) may require immediate or urgent coronary artery bypass grafting (CABG). Ticagrelor is a potent P2Y12 receptor antagonist increasingly used in the management of ACS. Although current guidelines suggest discontinuing ticagrelor at least 5 days prior to CABG, the optimal timing of CABG following ticagrelor administration has not been well established. We sought to assess in-hospital clinical outcomes in ACS patients following CABG in relation to the duration of ticagrelor discontinuation prior to surgery. We identified consecutive ACS patients who underwent CABG after having received ticagrelor. Patients were divided into 3 groups based on the timing of surgery after discontinuation of ticagrelor (<48 hours, 48 hours to <5 days, 5 or more days). We then compared clinical outcomes following CABG in relation to the duration of ticagrelor discontinuation. Clinical variables evaluated included postoperative bleeding, need for surgical reopening or blood transfusions, and length of stay in the intensive care unit (ICU). Of 336 patients undergoing CABG following ACS between January 2012 and December 2013, 38 received ticagrelor prior to CABG. Ticagrelor had been discontinued <48 hours prior to CABG in 14 patients (37%); 48 hours to <5 days in 14 (37%); and 5 days or more in 10 (26%). Baseline characteristics were comparable between ticagrelor discontinuation strata. CABG was deemed to be needed immediately in 21% of patients; within 24 hours in 11%; and on an urgent basis in the remaining 68%. Patients who underwent CABG <48 hours after ticagrelor discontinuation had more preoperative intra-aortic balloon pump use, and were more likely to require blood transfusions and a prolonged ICU stay (defined as >3 days). In addition, they had numerically higher, but non-statistically significant, rates of postoperative bleeding. Patients who underwent CABG 48 hours to <5 days after ticagrelor discontinuation had similar rates of postoperative bleeding and duration of ICU stay compared to patients who waited at least 5 days. A significant proportion of ACS patients who require CABG undergo surgery before the guideline recommended ticagrelor discontinuation period of 5 days. Patients who undergo CABG <48 hours after ticagrelor discontinuation are more like to require postoperative blood transfusions and a prolonged ICU stay. Notably, patients who undergo CABG 48 hours to <5 days after ticagrelor discontinuation have similar postoperative outcomes compared to patients who undergo CABG after 5 days of ticagrelor discontinuation. Large prospective series are needed to corroborate these findings.View Large Image Figure ViewerDownload (PPT)

Predictors of acute kidney injury after coronary artery surgery in Jordanians

Acute kidney injury after coronary artery bypass surgery is associated with increased morbidity and mortality. We investigated the predictors of acute kidney injury in a major hospital in Jordan. A retrospective analysis was conducted of clinical, operative, and outcome data of 867 patients (mean age 59 ± 9.8 years) who underwent isolated coronary bypass surgery with cardiopulmonary bypass. Acute kidney injury postoperatively, defined as ≥100% increase in serum creatinine level, was the outcome variable. Retrospective clinical, laboratory, and demographic data, and medication use, were obtained from electronic medical records. Univariate analysis revealed that chronic obstructive pulmonary disease, recent myocardial infarction, emergency surgery, preoperative intraaortic balloon pump use, left atrial size >4 cm, grade 1 mitral regurgitation, pneumonia, intensive care unit stay, prolonged vasopressor support, and stroke or transient ischemic attack were significantly associated with postoperative renal failure. On multivariate logistic regression, emergency surgery (adjusted odds ratio = 2.17, p = 0.017), grade 1 mitral regurgitation (adjusted odds ratio = 2.05, p = 0.020), prolonged support (adjusted odds ratio = 3.16, p = 0.000), and stroke (adjusted odds ratio = 20.1, p = 0.004) were independent predictors of kidney injury following coronary bypass surgery. Emergency coronary surgery, mitral regurgitation, prolonged inotropic support, and stroke or transient ischemic attack are independent predictors of acute kidney injury following coronary bypass surgery. Further studies involving patients with isolated coronary bypass surgery as well as valve and combined surgeries may be necessary to complete our understanding of this subject.

A Randomized Controlled Trial of Preoperative Intra-Aortic Balloon Pump in Coronary Patients With Poor Left Ventricular Function Undergoing Coronary Artery Bypass Surgery*

Preoperative intra-aortic balloon pump use in high-risk patients undergoing surgical coronary revascularization is still a matter of debate. The objective of this study is to determine whether the preoperative use of an intra-aortic balloon pump improves the outcome after coronary operations in high-risk patients. Single-center prospective randomized controlled trial. Tertiary cardiac surgery center, research hospital. One hundred ten subjects undergoing coronary operations, with a poor left ventricular ejection fraction (< 35%) and no hemodynamic instability. Patients randomized to receive preincision intra-aortic balloon pump or no intervention. The primary outcome measurement was postoperative major morbidity rate, defined as one of prolonged mechanical ventilation, stroke, acute kidney injury, surgical revision, mediastinitis, and operative mortality. There was no difference in major morbidity rate (40% in intra-aortic balloon pump group and 31% in control group; odds ratio, 1.49 [95% CI, 0.68-3.33]). No differences were observed for cardiac index before and after the operation; at the arrival in the ICU, patients in the intra-aortic balloon pump group had a significantly (p = 0.01) lower mean systemic arterial pressure (80.1 ± 15.1 mm Hg) versus control group patients (89.2 ± 17.9 mm Hg). Fewer patients in the intra-aortic balloon pump group (24%) than those in the control group (44%) required dopamine infusion (p = 0.043). This study demonstrates that in patients undergoing nonemergent coronary operations, with a stable hemodynamic profile and a left ventricular ejection fraction less than 35%, the preincision insertion of intra-aortic balloon pump does not result in a better outcome. Given the possible complications of intra-aortic balloon pump insertion, and the additional cost of the procedure, this approach is not justified.

Safety and Efficacy of Selected Preoperative Intra-Aortic Balloon Pump Use in Continuous Flow Left Ventricular Assist Device (LVAD) Recipients: An Analysis of 200 Recipients

Safety and Efficacy of Selected Preoperative Intra-Aortic Balloon Pump Use in Continuous Flow Left Ventricular Assist Device (LVAD) Recipients: An Analysis of 200 Recipients