Improvements in Accuracy and Confidence in Rhythm Identification After Cardiac Surgery Using the AtriAmp Signals

Area of Science:

• Cardiology
• Pediatric Critical Care
• Medical Device Technology

Background:

• Arrhythmias are common post-cardiac surgery in congenital heart disease patients (50-60%), increasing morbidity and mortality.
• Accurate and rapid arrhythmia identification is crucial for improving patient outcomes.
• Existing surface ECG methods may have limitations in post-operative settings.

Purpose of the Study:

• To evaluate the AtriAmp device's impact on provider accuracy and confidence in diagnosing arrhythmias.
• To compare arrhythmia diagnosis using atrial electrogram (AEG) via AtriAmp versus surface ECG alone.
• To assess the utility of AEG display on bedside monitors for post-operative rhythm assessment.

Main Methods:

• A prospective observational study involving 88 critical care and cardiology providers.
• Providers evaluated arrhythmia diagnoses from surface ECG and AEG signals using a 12-question online survey.
• Statistical analysis included paired t-tests and mixed methods modeling to compare accuracy and confidence.

Main Results:

• Interpreting with the AtriAmp signal significantly increased diagnostic accuracy (P=.002) and confidence (P<.001) compared to surface ECG alone.
• Specific arrhythmias like junctional ectopic tachycardia, sinus tachycardia, and complete heart block showed the most significant accuracy improvements with AtriAmp.
• The AtriAmp facilitated more precise identification of complex post-operative arrhythmias.

Conclusions:

• The AtriAmp device enhances provider accuracy and confidence in diagnosing post-operative arrhythmias.
• Integrating AEG display via AtriAmp into bedside monitoring improves rhythm diagnosis compared to surface ECGs alone.
• This technology holds potential for improving patient care and outcomes following cardiac surgery.