A team‐based approach to patients in cardiogenic shock

Cardiogenic shock is a common clinical condition with high in‐hospital mortality. Early application of appropriate interventions for cardiogenic shock—including medical therapies, revascularization, temporary hemodynamic support devices, and durable mechanical circulatory support—may improve outcomes. The number and complexity of therapies for cardiogenic shock are increasing, making time‐dependent decision‐making more challenging. A multidisciplinary cardiogenic shock team is recommended to guide the rapid and efficient use of these available treatments. © 2015 Wiley Periodicals, Inc.     

Percutaneous bi‐atrial extracorporeal membrane oxygenation for acute circulatory support in advanced heart failure

Veno‐arterial extracorporeal membrane oxygenation (VA‐ECMO) may improve survival after cardiac arrest by providing cardiopulmonary support. However, VA‐ECMO increases left ventricular (LV) afterload, which can promote progressive LV distension and often requires a secondary approach to reduce LV pressure and volume in patients with left heart failure. We report a case of biventricular unloading via biatrial cannulation in the presence of LV thrombus using a TandemHeart percutaneous trans‐septal cannula for VA‐ECMO in an adult patient with refractory ventricular fibrillation. © 2014 Wiley Periodicals, Inc.     

Management of cardiogenic shock complicating acute myocardial infarction: A review

Despite advances in percutaneous coronary interventions and their widespread use, mortality in patients presenting with acute myocardial infarction (MI) complicated by cardiogenic shock (CS) has remained very high, and treatment options are limited. Limited evidences exist, supporting many of the routinely used therapies in treating these patients. In the present article, we discuss CS complicating MI in general and an update on the currently available treatment options, including inotropes and vasopressor, coronary revascularization, mechanical circulatory support devices, mechanical complications, and long‐term outcomes.     

Thrombolysis in acute myocardial infarction complicated by cardiogenic shock

The adverse impact of the development of cardiogenic shock in the setting of acute myocardial infarction was first described by Killip and Kimball in 1967. While the inhospital mortality rate in patients with myocardial infarction and no evidence of heart failure was only 6%, the mortality rate in those patients who developed cardiogenic shock was 81%. Despite advances in cardiovascular care and therapy since that initial report, including universal institution of cardiac care units, advances in hemodynamic monitoring, new inotropic and vasodilating agents, and even increasing utilization of thrornbolytic therapy, the mortality from acute myocardial infarction, when complicated by cardiogenic shock, remains disturbingly high, and cardiogenic shock remains the leading cause of death of hospitalized patients following acute myocardial infarction.The grave prognosis associated with this condition has resulted in increased interest in potential therapeutic interventions, particularly in the area of reperfusion therapy. Several studies suggest that, in contrast to the beneficial effects of thrombolytic therapy in most patient populations suffering acute myocardial infarction, mortality rates are not decreased in those patients with cardiogenic shock at the time of lytic administration. Thrombolytic administration does, however, appear to lead to a modest reduction in the percent of patients with myocardial infarction who will subsequently develop cardiogenic shock during hospitalization.Reperfusion rates with lytic therapy in patients with cardiogenic shock are disappointingly low, in the range of 42–48%, significantly lower than those achieved in patients without cardiogenic shock. These low perfusion rates may, in part, be explained by decreased coronary blood flow and perfusion pressure in patients with left ventricular pump failure.Although promising as adjunctive therapy, it is unclear whether institution of balloon counterpulsation has any long-term benefit in patients with cardiogenic shock treated with thrombolytic therapy. Whether other or additional interventions, such as coronary angioplasty and coronary artery bypass graft (CABG), decrease mortality rates in patients with cardiogenic shock remains to be determined.     

急性心肌梗死并发心源性休克的临床特征

目的分析急性心肌梗死并发心源性休克患者的临床特征。方法连续收集我院1995年2005年初发急性ST段抬高心肌梗死患者资料,按照是否有心源性休克分为两组。分析患者一般情况、化验指标、危险因素、并发症和病死率的差异。结果休克组年龄显著高于非休克组[（70±9）岁vs（63±12）岁,P<0.01];两组间血清磷酸激酶同工酶（CK-MB）、WBC和电解质水平无显著差异;休克组吸烟者明显少于非休克组（19%vs52%,P<0.01）,其他危险因素无显著差异;休克组心律失常和心脏破裂的发生率显著增高,病死率明显高于非休克组（83%vs8%,P<0.01）。结论高龄是心肌梗死并发心源性休克的关键因素之一,心源性休克患者临床情况更为凶险,预后不良。     

急性心肌梗死并发心源性休克的干预进展

心源性休克是急性心肌梗死（AMI）最严重的并发症之一,其发病率为7％～10％。近些年,随着经皮冠状动脉介入术（PCI）、冠状动脉旁路移植术（CABG）等血运重建技术的熟练应用和多巴胺、主动脉球囊反搏技术（IABP）的有效配合,以及新型药物左西孟坦和心室辅助装置（VAD）、体外膜氧合（ECMO）的应用,其病死率由70年代的70％～80％下降到50％。本文综述了急性心肌梗死并发的心源性休克的诊断标准、病理生理机制、尤其是干预手段的应用进展。     

Use of mechanical circulatory support in patients with non-ischaemic cardiogenic shock

Aims

Despite its high incidence and mortality risk, there is no evidence-based treatment for non-ischaemic cardiogenic shock (CS). The aim of this study was to evaluate the use of mechanical circulatory support (MCS) for non-ischaemic CS treatment.

Methods and results

In this multicentre, international, retrospective study, data from 890 patients with non-ischaemic CS, defined as CS due to severe de-novo or acute-on-chronic heart failure with no need for urgent revascularization, treated with or without active MCS, were collected. The association between active MCS use and the primary endpoint of 30-day mortality was assessed in a 1:1 propensity-matched cohort. MCS was used in 386 (43%) patients. Patients treated with MCS presented with more severe CS (37% vs. 23% deteriorating CS, 30% vs. 25% in extremis CS) and had a lower left ventricular ejection fraction at baseline (21% vs. 25%). After matching, 267 patients treated with MCS were compared with 267 patients treated without MCS. In the matched cohort, MCS use was associated with a lower 30-day mortality (hazard ratio 0.76, 95% confidence interval 0.59–0.97). This finding was consistent through all tested subgroups except when CS severity was considered, indicating risk reduction especially in patients with deteriorating CS. However, complications occurred more frequently in patients with MCS; e.g. severe bleeding (16.5% vs. 6.4%) and access-site related ischaemia (6.7% vs. 0%).

Conclusion

In patients with non-ischaemic CS, MCS use was associated with lower 30-day mortality as compared to medical therapy only, but also with more complications. Randomized trials are needed to validate these findings.     

Mechanical circulatory support for acute right ventricular failure in the setting of pulmonary embolism

Background

Right ventricular (RV) failure due to pulmonary embolism (PE) increases morbidity and mortality and contributes to prolonged hospital length of stay and higher costs of care. RV mechanical circulatory support (MCS) including Impella RP devices have been increasingly used in hemodynamically compromised PE patients who are refractory to intravascular volume expansion and inotropic therapy. However, effectiveness and safety of Impella RP, in hemodynamically unstable PE patients is unknown.

Methods

We included consecutive patients who presented to Detroit Medical Center between November 3, 2015 and October 2, 2017 with acute PE and had evidence of hemodynamic compromise indicating Impella RP.

Results

Total of five cases were identified. All patients met the shock definition due to massive or submassive PE and therefore received Impella RP on admission. Cardiac index was improved from mean of 1.69/min/m^2, (0.88‐2.15 L/min/m²), to 2.5 L/min/m² (range 1.88‐3.4), after 24 h of treatment. Similarly, mean heart rate reduced to 92 beats per minute (79‐105), and mean systolic blood pressure increased to 140 mmHg (115‐179). No significant changes were found in renal function, hemoglobin and platelets level during device use. One patient experienced hemoglobin drop from 13.7 to 7.3 g/dL but did not require blood transfusion. All patients survived to discharge.

Conclusion

In patients with PE and RV shock, Impella RP device resulted in immediate hemodynamic benefit with reversal of shock and favorable survival to discharge.

     

早期发生急性肾衰竭与急性心肌梗死后心源性休克患者预后的关系

目的了解急性心肌梗死后心源性休克患者早期发生急性肾衰竭与其预后的关系.方法回顾性分析解放军总医院1993～2003年间,因急性心肌梗死或冠心病心绞痛住院,并出现心源性休克的病例,以24h内是否出现急性肾衰竭为标准,比较其住院期间死亡率,并采用多元Logistic回归分析,评估早期发生急性肾衰竭对患者预后的影响.结果符合统计分析标准的患者共172例,其中51例(30%)于24h内出现急性肾衰竭.有无早期发生急性肾衰竭的患者,其住院死亡率分别为90%(46/51)和56%(68/121).逐步回归分析表明,早期发生急性肾衰竭是影响急性心肌梗死后心源性休克患者预后的独立因素(OR=6.7,95%可信限2.5～18;P＜0.001).结论急性心肌梗死后心源性休克患者,早期发生急性肾衰竭,与其住院死亡率显著相关,可作为判断患者不良预后的指标.     

Primary cardiogenic shock during acute myocardial infarction: results of emergency cardiac transplantation

Fifteen patients with acute myocardial infarction and cardiogenicshock underwent emergency cardiac transplantation after medicaltreatment failed to improve their haemodynamic status. Theirmean age was 49 ± 7 years. The infarction was anteriorin 12 cases, inferoposterior in two cases, and septal in one.Shock occurred within 3 days after the onset of chest pain innine patients, and during the first day in six of them. Mechanicalcirculatory assistance was used in six patients as a bridgeto transplantation when their haemodynamic status could notbe stabilized pharmacologically. Orthotopic cardiac transplantationwas performed an average of 15.6 ± 14 days after onsetof infarction. Three patients died during the early post-operativeperiod. Another died 7 months after transplantation. Duringthe mean follow-up period of 30.6 ± 20.3 months, therewere three acute rejections, all successfully treated, and onechronic rejection. The survival rate for this series is 70%.Thus, emergency cardiac transplantation may be the best optionfor selected patients with acute myocardial infarction and cardiogenicshock refractory to conventional therapy.     

Percutaneous biventricular Impella support in therapy-refractory cardiogenic shock

Introduction

Percutaneous mechanical circulatory support systems have increasingly been adopted as a bail out strategy in patients with cardiogenic shock. Since studies showed mostly mixed results, however, the use of support systems remains a case by case decision.

A risk-predictive score for cardiogenic shock after acute myocardial infarction in Chinese patients

BACKGROUND: Cardiogenic shock after acute myocardial infarction (AMI) remains a poor prognosis. Although numerous studies discussed the predictors of cardiogenic shock complicating AMI, the data in Chinese patients is still absent. The goal of this study is to develop a risk-predictive score for cardiogenic shock after AMI, among Chinese patients, so as to guide clinicians to prevent cardiogenic shock. METHODS: Patients with ST-segment elevated AMI were provided by two Chinese hospitals from 1994 to 2004. Baseline characteristics of each case were documented. Multivariable logistic regression modeling techniques were used to develop a model to predict the occurrence of cardiogenic shock within 72 h after admission. On the basis of the coefficients in the model, a risk score was developed for the probability of cardiogenic shock. To test its viability, another population, which was consistent with the original population, confirmed the scoring. RESULTS: Among 2,077 patients, 184 cases developed cardiogenic shock within 72 h. Age, gender, BMI, killip class, MI location, multivessel disease, previous MI, family history of CAD, and thrombolytic therapy were strong predictors for shock after AMI. A risk-predictive score for shock was developed. It predicted cardiogenic shock accurately in another Chinese population. CONCLUSIONS: A predictive model is developed in Chinese patients with AMI for the first time. It is based on some simple parameters, which can be easily obtained by clinicians. The risk score derived from the model can predict cardiogenic shock accurately.