Key result
Signal-averaged ECG mapping revealed that 66.7% of myocardial infarction patients with sustained ventricular tachycardia had large extrema on departure ratio maps compared to 18.3% of those without ventricular tachycardia.
Why the study?
Does signal-averaged ECG mapping identify specific body surface distributions of late potentials associated with ventricular tachycardia in patients with previous myocardial infarction?
Cross-Sectional (n=104)
No
Does signal-averaged ECG mapping identify specific body surface distributions of late potentials associated with ventricular tachycardia in patients with previous myocardial infarction?
Absolute Event Rate: 66.7% vs 18.3%
p-value: p=<0.01
Signal-averaged ECG mapping reveals specific spatial patterns of late potentials that correlate strongly with the presence of sustained ventricular tachycardia in patients with prior myocardial infarction.
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Kato et al. (1992) conducted a cross-sectional in Previous myocardial infarction (n=104). Signal-averaged ECG mapping vs. Patients without ventricular tachycardia (VT(-)) was evaluated on Presence of large extrema (≥2 SD) on the departure ratio map in the corresponding infarction area (p=<0.01). Signal-averaged ECG mapping revealed that 66.7% of myocardial infarction patients with sustained ventricular tachycardia had large extrema on departure ratio maps compared to 18.3% of those without ventricular tachycardia.
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