Key result
High QRST area map non-dipolarity predicts post-MI chronic ventricular tachycardia with ~82% sensitivity.
Why the study?
The relationship between non-dipolarity of body surface QRST area maps and ventricular tachycardia after myocardial infarction was unclear.
Does the non-dipolarity of body surface QRST area maps predict ventricular tachycardia in the chronic phase of myocardial infarction?
Observational (n=103)
No
Does the non-dipolarity of body surface QRST area maps predict ventricular tachycardia in the chronic phase of myocardial infarction?
The non-dipolarity of body surface QRST area maps is a useful non-invasive marker for predicting the occurrence of ventricular tachycardia in the chronic phase following a myocardial infarction.
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TSUNAKAWA et al. (1988) conducted an observational in Myocardial infarction and ventricular tachycardia (n=103). Non-dipolarity (residue) of QRST area maps vs. Normal subjects and AMI patients without chronic ventricular tachycardia was evaluated on Mean residue of QRST area maps in patients with chronic phase ventricular tachycardia (p=<0.01). A non-dipolarity residue of ≥25% on QRST area maps predicted the occurrence of chronic phase ventricular tachycardia following myocardial infarction with 82% sensitivity and 71% specificity.
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