December 1, 1995European Heart Journal
Time domain analysis of the signal averaged electrocardiogram in patients with a conduction defect or a bundle branch block
Key result
Modified late potential criteria on signal averaged ECG detected sustained ventricular tachycardia with 68% sensitivity and 73% specificity in patients with a QRS complex ≥120 ms.
Why the study?
Does time domain analysis of the signal averaged electrocardiogram accurately detect sustained ventricular tachycardia in patients with a conduction defect or bundle branch block?
Population
147 patients with a conduction defect or bundle branch block, including 77 with a minor conduction defect…
Comparison
Time domain analysis of the signal averaged… vs Patients with sustained ventricular tachycardia…
Design
Cross-sectional
Authors
Discussion
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Implication
Should not yet change VT risk assessment in wide QRS; leaves open prospective validation of modified criteria.
Study Design
Type
Observational (n=147)
Structured PICO
Does time domain analysis of the signal averaged electrocardiogram accurately detect sustained ventricular tachycardia in patients with a conduction defect or bundle branch block?
P
Population
147 patients with a QRS complex longer than 100 ms evaluated for sustained ventricular tachycardia using signal averaged ECG.
E
Exposure
Time domain analysis of the signal averaged electrocardiogram (SAECG, 40-250 Hz) using traditional and modified late potential criteria.
C
Comparator
Patients with sustained ventricular tachycardia versus those without sustained ventricular tachycardia.
O
Outcome
Sensitivity and specificity of SAECG criteria for the detection of sustained ventricular tachycardia.surrogate
Modified late potential criteria on signal averaged ECG can provide useful risk stratification for sustained ventricular tachycardia in patients with prolonged QRS duration >= 120 ms.
Cite This Study
Gatzoulis et al. (1995) conducted an observational in Prolonged QRS complex duration (n=147). Signal averaged ECG vs. Patients without sustained ventricular tachycardia was evaluated on Detection of sustained ventricular tachycardia. Modified late potential criteria on signal averaged ECG detected sustained ventricular tachycardia with 68% sensitivity and 73% specificity in patients with a QRS complex ≥120 ms.