[Spatial distribution of high-frequency components in the terminal QRS complex in patients with ventricular tachycardia and previous myocardial infarction--comparison of late potential map and spectral analysis].
It is clinically important to predict the ventricular tachycardia (VT) for the prognosis in patients with previous myocardial infarction. Low-amplitude high-frequency components observed at the end of QRS complex, termed "late potentials" are associated with VT. The use of signal-averaged body surface mapping technique enabled us to study spatial distributions of high-frequency components in the QRS terminal portion. In this paper, we investigated body surface distributions of high-frequency components in the terminal QRS complex, compared with late potential map and spectral analysis. Signal-averaged body surface mapping will provide new electrical information regarding understanding of the high-frequency components in the QRS complex.
Shibata
T
T
Department of Internal Medicine, Sakata Municipal Hospital.
Kubota
I
I
D018780:Body Surface Potential Mapping; D005071:Evoked Potentials; D006801:Humans; D009203:Myocardial Infarction / Q000150:complications / Q000503:physiopathology*; D011379:Prognosis; D011930:Reaction Time; D017180:Tachycardia, Ventricular / Q000209:etiology / Q000503:physiopathology*