Related Experiment Video
Updated: May 28, 2025
Utilizing Percutaneous Ventricular Assist Devices in Acute Myocardial Infarction Complicated by Cardiogenic Shock
Published on: June 12, 2021
Clinical Prediction Score for Successful Liberation from Temporary Mechanical Circulatory Support in Cardiogenic
Stefania Sacchi1, Angela Venuti1, Francesca Maria Gobbi1
1Cardiac Intensive Care Unit, San Raffaele University Hospital, Milan, Italy.
Insights
A new W score predicts successful temporary mechanical circulatory support (tMCS) liberation in cardiogenic shock (CS) patients. This score aids clinicians in identifying patients likely to recover and avoid advanced therapies.
Area of Science:
- Cardiology
- Critical Care Medicine
- Medical Device Technology
Background:
- Cardiogenic shock (CS) necessitates temporary mechanical circulatory support (tMCS).
- Accurate assessment of cardiac recovery versus the need for heart replacement is crucial for CS patients on tMCS.
- Predicting successful tMCS liberation is vital for patient management and resource allocation.
Purpose of the Study:
- To develop and validate a novel clinical score (the W score) for predicting successful liberation from tMCS in CS patients.
- To identify key clinical and laboratory parameters that predict successful tMCS weaning.
- To assess the diagnostic accuracy of the W score in independent cohorts.
Main Methods:
- Analysis of 80 CS patients treated with Impella support, collecting hemodynamic, echocardiographic, and laboratory data at multiple time points.
- Development of the W score based on independent predictors of successful tMCS liberation.
- Validation of the W score in two independent cohorts (86 patients at the same center, 23 patients externally).
Main Results:
- The W score incorporates left ventricular ejection fraction, N-terminal pro-brain natriuretic peptide, inotropic score, creatinine, and lactate.
- A W score cutoff of ≥7 demonstrated high diagnostic accuracy (AUC 0.92, sensitivity 80%, specificity 85%) for predicting successful tMCS liberation.
- The W score showed good performance in validation cohorts, with AUCs of 0.80 and 0.72 in internal and external centers, respectively.
Conclusions:
- The W score, utilizing parameters at 24 and 96 hours post-tMCS insertion, effectively predicts successful liberation.
- This score provides valuable clinical support for decision-making in CS patients requiring tMCS.
- The W score aids in identifying patients who may successfully wean off mechanical support.
Background:
In cardiogenic shock (CS) patients requiring temporary mechanical circulatory support (tMCS), assessing cardiac recovery vs the need for heart replacement therapy is critical. We developed and validated a new clinical score aimed at predicting successful tMCS liberation.
Methods:
A cohort of 80 CS patients treated with Impella support between January 2018 and December 2020 was analyzed. Hemodynamic, echocardiographic, and laboratory data were collected at baseline, 24 hours, 48 hours, and 96 hours after device insertion. Patients were classified as successfully or unsuccessfully liberated from tMCS, based on recovery vs progression to death, left ventricular assist device implantation, or heart transplant. The W score, derived using independent predictors of successful liberation, was validated in 2 cohorts: 86 CS patients at our center and 23 patients from an external center.
Results:
Among the 80 patients (mean age 62.5 ± 11.8 years, 63.7% acute myocardial infarction CS), 47.5% achieved successful tMCS liberation. Independent predictors included left ventricular ejection fraction, N-terminal pro-brain natriuretic peptide, and inotropic score at 24 hours, along with creatinine and lactate at 96 hours (area under the curve [AUC] ≥ 0.7, P < 0.05). The W score, using a cutoff of ≥7, demonstrated good diagnostic accuracy (AUC 0.92, sensitivity 80%, specificity 85%, P < 0.001). In validation cohorts, a score ≥7 predicted successful liberation with AUCs of 0.80 (P < 0.001) and 0.72 (P < 0.015) at the internal and external centers, respectively.
Conclusions:
The W score, based on key parameters at 24 and 96 hours post-tMCS, effectively supports clinicians in identifying CS patients likely to achieve successful tMCS liberation.
