Federico Pappalardo1, Silvia Ajello1, Massimiliano Greco2, Małgorzata Celińska-Spodar3, Michele De Bonis4, Alberto Zangrillo1, Andrea Montisci5. 1. Department of Anesthesia and Intensive Care, San Raffaele Scientific Institute, Milan, Italy. 2. Department of Anesthesia and Intensive Care, IRCCS Humanitas Research Hospital, Milan, Italy. 3. Department of Interventional Cardiology and Angiology, Institute of Cardiology, Warsaw, Poland. 4. Department of Cardiac Surgery, San Raffaele Scientific Institute, Milan, Italy. 5. Department of Anesthesia and Intensive Care, Cardiothoracic Centre, Istituto Clinico Sant'Ambrogio, Gruppo Ospedaliero San Donato, Milan, Italy.
Abstract
BACKGROUND: Intra-aortic balloon pump (IABP) had a pivotal role in the therapy of cardiogenic shock (CS), but recent studies have questioned its effects on patients' outcome. Aim of this study is the description of a "real world" series of patients in which IABP was used as a primary mechanical circulatory support (MCS). METHODS: All patients who received IABP in our institution during 1 year were prospectively enrolled in our study. The outcomes were: ICU mortality, length of ICU stay, factors associated with mortality and complications of IABP. A logistic regression model was developed to estimate the effect of several risk factors on mortality. RESULTS: A total of 119 patients were enrolled, 54 patients underwent IABP placement for CS unrelated to cardiac surgery (medical CS) and 65 after open-heart surgery. There was no significant difference for mortality between medical CS [12/54 (22.2%)] and cardiac surgery [7/65 (10.8%)] (P=0.09). The morbidity rate related to IABP was 11.3%. Multivariable analysis identified AKI (OR =9.3; 95% CI, 2.0-40.0; P=0.004), inotropic score at the time of IABP implantation (OR =1.06; 95% CI, 1.01-1.11; P=0.009) and history of myocardial revascularization (OR =4.7; 95% CI, 1.1-20.2; P=0.036) as independent predictors for early death (P<0.05). A ROC curve analysis for inotropic score at time of implantation and mortality was performed in the overall population [AUC=0.78 (95% CI, 0.66-0.90)]. A cutoff of 20 has a specificity =72% and sensitivity=74% in this population. CONCLUSIONS: Mortality is similar in medical and postcardiotomy CS. The benefits of IABP are limited if the amount of inotropes and the severity of shock are too high.
BACKGROUND: Intra-aortic balloon pump (IABP) had a pivotal role in the therapy of cardiogenic shock (CS), but recent studies have questioned its effects on patients' outcome. Aim of this study is the description of a "real world" series of patients in which IABP was used as a primary mechanical circulatory support (MCS). METHODS: All patients who received IABP in our institution during 1 year were prospectively enrolled in our study. The outcomes were: ICU mortality, length of ICU stay, factors associated with mortality and complications of IABP. A logistic regression model was developed to estimate the effect of several risk factors on mortality. RESULTS: A total of 119 patients were enrolled, 54 patients underwent IABP placement for CS unrelated to cardiac surgery (medical CS) and 65 after open-heart surgery. There was no significant difference for mortality between medical CS [12/54 (22.2%)] and cardiac surgery [7/65 (10.8%)] (P=0.09). The morbidity rate related to IABP was 11.3%. Multivariable analysis identified AKI (OR =9.3; 95% CI, 2.0-40.0; P=0.004), inotropic score at the time of IABP implantation (OR =1.06; 95% CI, 1.01-1.11; P=0.009) and history of myocardial revascularization (OR =4.7; 95% CI, 1.1-20.2; P=0.036) as independent predictors for early death (P<0.05). A ROC curve analysis for inotropic score at time of implantation and mortality was performed in the overall population [AUC=0.78 (95% CI, 0.66-0.90)]. A cutoff of 20 has a specificity =72% and sensitivity=74% in this population. CONCLUSIONS: Mortality is similar in medical and postcardiotomy CS. The benefits of IABP are limited if the amount of inotropes and the severity of shock are too high.
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