On the consistency of ECG reports from two different computer-based ECG recorders

Area of Science:

• Cardiology
• Medical Device Technology
• Electrocardiography

Background:

• Electrocardiogram (ECG) interpretation relies on accurate computer-based measurements.
• Different ECG devices may yield varying results, impacting diagnostic accuracy.
• Assessing the comparative performance of ECG recorders is crucial for clinical decision-making.

Purpose of the Study:

• To compare the consistency and diagnostic accuracy of two computer-based ECG recorders: MAC II and Cardisuny.
• To evaluate specific ECG parameters (PQ interval, Q-width, R-amplitude, QRS axis) and diagnostic statements (atrial fibrillation, myocardial infarction) between the devices.

Main Methods:

• Four consecutive computer-based ECG recordings were performed on 100 patients using both MAC II and Cardisuny devices.
• Key ECG measurements and diagnostic interpretations were compared between the two recorders.
• Statistical analysis focused on consistency, sensitivity, and specificity of measurements and diagnoses.

Main Results:

• The MAC II recorder exhibited superior consistency in ECG measurements compared to the Cardisuny.
• The Cardisuny demonstrated a trend towards higher sensitivity, while the MAC II showed a trend towards higher specificity.
• The MAC II produced no false positive atrial fibrillation reports and only one false positive myocardial infarction report.

Conclusions:

• The MAC II recorder offers greater measurement consistency in computer-based ECG analysis.
• Device selection may influence diagnostic sensitivity and specificity, impacting clinical interpretation.
• The MAC II demonstrates a favorable performance profile regarding false positive diagnoses for atrial fibrillation and myocardial infarction.