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Early Prediction of Cardiac Arrest Based on Time-Series Vital Signs Using Deep Learning: Retrospective Study
1College of Artificial Intelligence and Computer Science, Northwest Normal University, Lanzhou, China.
Insights
This study introduces TrGRU, a deep learning model that accurately predicts cardiac arrest (CA) using vital signs, improving early detection and patient outcomes. The model demonstrates strong generalization, offering a promising tool for clinical healthcare providers.
Area of Science:
- Biomedical Engineering
- Artificial Intelligence in Medicine
- Critical Care Medicine
Background:
- Cardiac arrest (CA) presents a significant global health challenge with high mortality rates.
- Early CA identification is crucial for reducing mortality, but current prediction models lack sensitivity and generalization.
- Existing models struggle with high false alarm rates and insufficient validation across diverse datasets.
Purpose of the Study:
- To develop a real-time cardiac arrest prediction model using clinical vital signs.
- To predict CA events within a 1-hour window at 5-minute intervals based on 2-hour historical data.
- To validate the model's generalization capability using the eICU-CRD dataset for external assessment.
Main Methods:
- A deep learning model, TrGRU (Transformer-Gated Recurrent Unit), was developed using the MIMIC-III waveform database.
- Six features were extracted, and statistical features from a sliding window were incorporated to enhance prediction.
- Model performance was evaluated using accuracy, sensitivity, AUROC, and AUPRC, with external validation on the eICU-CRD dataset.
Main Results:
- The TrGRU model achieved high performance metrics: 0.904 accuracy, 0.859 sensitivity, 0.957 AUROC, and 0.949 AUPRC.
- External validation on the eICU-CRD dataset demonstrated excellent generalization with 0.813 sensitivity, 0.920 AUROC, and 0.848 AUPRC.
- The model's predictive performance surpassed that of previously reported studies.
Conclusions:
- The TrGRU model offers high sensitivity and a low false-alarm rate for timely and accurate CA prediction.
- A meta-learning approach was employed to effectively enhance the model's generalization capabilities.
- The model shows significant promise for practical clinical application in healthcare settings.
Background:
Cardiac arrest (CA), characterized by an extremely high mortality rate, remains one of the most pressing global public health challenges. It not only causes a substantial strain on health care systems but also severely impacts individual health outcomes. Clinical evidence demonstrates that early identification of CA significantly reduced the mortality rate. However, the developed CA prediction models exhibit limitations such as low sensitivity and high false alarm rates. Moreover, issues with model generalization remain insufficiently addressed.
Objective:
The aim of this study was to develop a real-time prediction method based on clinical vital signs, using patient vital sign data from the past 2 hours to predict whether CA would occur within the next 1 hour at 5-minute intervals, thereby enabling timely and accurate prediction of CA events. Additionally, the eICU-CRD dataset was used for external validation to assess the model's generalization capability.
Methods:
We reviewed and analyzed 4063 patients from the MIMIC-III waveform database, extracting 6 features to develop a deep learning-based CA prediction model named TrGRU. To further enhance performance, statistical features based on a sliding window were also constructed. The TrGRU model was developed using a combination of transformer and gated recurrent unit architectures. The primary evaluation metrics for the model included accuracy, sensitivity, area under the receiver operating characteristic curve (AUROC), and area under the precision-recall curve (AUPRC), with generalization capability validated using the eICU-CRD dataset.
Results:
The proposed model yielded an accuracy of 0.904, sensitivity of 0.859, AUROC of 0.957, and AUPRC of 0.949. The results showed that the predictive performance of TrGRU was superior to that of the models reported in previous studies. External validation using the eICU-CRD achieved a sensitivity of 0.813, an AUROC of 0.920, and an AUPRC of 0.848, indicating excellent generalization capability.
Conclusions:
The proposed model demonstrates high sensitivity and a low false-alarm rate, enabling clinical health care providers to predict CA events in a more timely and accurate manner. The adopted meta-learning approach effectively enhances the model's generalization capability, showcasing its promising clinical application.
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