Frequency analysis of QRS complex with bundle branch block in patients with and without sustained ventricular tachycardia.
Jpn Circ J
; 57(11): 1027-37, 1993 Nov.
Article
em En
| MEDLINE
| ID: mdl-8230680
ABSTRACT
To distinguish patients with bundle branch block (BBB) and sustained ventricular tachycardia (s-VT) from patients with BBB but without s-VT, a frequency analysis of the QRS complex was performed in 71 patients. Frequency analysis of the QRS complex of patients with left bundle branch block (LBBB) showed that patients with s-VT had significantly larger areas and area ratios between 50 and 100 Hz in the X lead than patients without s-VT (area -0.905 +/- 0.231 vs -1.195 +/- 0.286. area ratio -0.783 +/- 0.230 vs -1.125 +/- 0.310; P < 0.05). The area and area ratios from 100 to 200 Hz in the Z lead were also larger in patients with s-VT. The highest predictive accuracy using the area ratio from 50 to 100 Hz in the X lead was 86%, with a sensitivity and specificity of 83% and 88%, respectively. In cases with LBBB, time domain analysis showed no significant difference between patients with s-VT and those without s-VT. Frequency analysis of the QRS complex may be useful for distinguishing LBBB patients with s-VT from those without s-VT.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Bloqueio de Ramo
/
Taquicardia Ventricular
/
Eletrocardiografia
Tipo de estudo:
Diagnostic_studies
/
Prognostic_studies
Limite:
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Jpn Circ J
Ano de publicação:
1993
Tipo de documento:
Article