ECG changes on continuous telemetry preceding in-hospital cardiac arrests
Duc H Do1, Justin Hayase1, Ricardo Dahmer Tiecher1
1Cardiac Arrhythmia Center, David Geffen School of Medicine at University of California, Los Angeles, CA.
Journal of Electrocardiology
|September 13, 2015
Summary
Continuous electrocardiogram (ECG) monitoring can identify patients at risk for in-hospital cardiac arrest (IHCA). Common ECG changes precede IHCA, suggesting potential for automated risk detection.
Area of Science:
- Cardiology
- Critical Care Medicine
- Medical Informatics
Background:
- In-hospital cardiac arrest (IHCA) affects approximately 200,000 patients annually.
- Early identification of at-risk patients is crucial for improving outcomes.
- The utility of continuous ECG monitoring for predicting IHCA has not been established.
Purpose of the Study:
- To characterize the types and timing of electrocardiogram (ECG) changes preceding IHCA.
- To explore the potential for ECG monitoring in identifying patients at risk for IHCA.
Main Methods:
- Retrospective, observational study at a single tertiary care hospital.
- Analysis of continuous telemetry data (up to 24 hours) prior to IHCA in 81 adult patients.
- Evaluation of ECG parameters including PR, QRS, ST segments, arrhythmias, and QTc intervals.
Main Results:
- Ventricular tachycardia/fibrillation, bradyasystole, and pulseless electrical activity (PEA) were the primary arrest mechanisms.
- Preceding ECG changes were frequent, including ST segment changes (31%), atrial tachyarrhythmias (21%), bradyarrhythmias (28%), and QRS/PR prolongation.
- At least one ECG abnormality was present in 77% of all IHCA cases, and 89% of those caused by respiratory or multiorgan failure.
Conclusions:
- ECG changes commonly precede IHCA and are linked to underlying pathophysiology.
- Bradyarrhythmias and PR/QRS prolongation were associated with specific failure types.
- Automated detection of these ECG changes could enhance IHCA risk identification.
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