Key result
A low value of the first principal component of ST-T waves (<69%) was significantly associated with sustained ventricular tachycardia in ARVD patients, yielding 67% sensitivity and 92% specificity.
Why the study?
Does principal component analysis of body-surface potential mapping identify repolarization abnormalities associated with ventricular tachycardia in patients with ARVD?
Population
22 patients affected by arrhythmogenic right ventricular dysplasia and 35 healthy control subjects.
Comparison
Body-surface potential mapping from 62 anterior… vs Healthy control subjects and ARVD patients…
Design
Case-control
Authors
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May support VT risk stratification in ARVD; leaves open prospective validation before clinical adoption.
Case-Control (n=57)
Does principal component analysis of body-surface potential mapping identify repolarization abnormalities associated with ventricular tachycardia in patients with ARVD?
Absolute Event Rate: 66.7% vs 7.7%
Principal component analysis of body-surface potential mapping can detect repolarization abnormalities in ARVD patients that are associated with vulnerability to ventricular tachycardia.
Ambroggi et al. (1997) conducted a case-control in Arrhythmogenic Right Ventricular Dysplasia (n=57). Low value of principal component 1 (<69%) of ST-T waves vs. Component 1 ≥69% was evaluated on Occurrence of sustained ventricular tachycardia. A low value of the first principal component of ST-T waves (<69%) was significantly associated with sustained ventricular tachycardia in ARVD patients, yielding 67% sensitivity and 92% specificity.
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