Characteristics of a New Repolarization Descriptor Substituted for T-Wave Morphology Analysis in Patients With Cardiomyopathy and Myocardial Infarction

Background Total cosine R-to-T (TCRT) is a descriptor of T-wave morphology analysis based on singular value decomposition of 12-lead electrocardiograms (ECGs), which is useful in risk stratification of patients with myocardial infarction (MI). A new marker of standard ECG substituted for TCRT is pro...

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Bibliographic Details
Published in:Circulation Journal 2006, Vol.70(10), pp.1322-1326
Main Authors: Ono, Takuya, Saitoh, Hirokazu, Itakura, Shioto, Tateoka, Katsuhiko, Ono, Isuzu, Hnatkova, Katerina, Kobayashi, Yoshinori, Takayama, Morimasa, Atarashi, Hirotsugu, Katoh, Takao, Takano, Teruo, Malik, Marek
Format: Article
Language:English
Subjects:
Adult
Aged
Cardiomyopathies - diagnosis
Diagnosis, Differential
Electrocardiography - methods
Electrocardiography - standards
Female
Humans
Male
Middle Aged
Myocardial Infarction - diagnosis
Risk Assessment
Sensitivity and Specificity
Software
T-wave morphology analysis
Ventricular gradient
Ventricular repolarization
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Summary:Background Total cosine R-to-T (TCRT) is a descriptor of T-wave morphology analysis based on singular value decomposition of 12-lead electrocardiograms (ECGs), which is useful in risk stratification of patients with myocardial infarction (MI). A new marker of standard ECG substituted for TCRT is proposed and the aim of this study was to evaluate the correlation between the new index and TCRT in patients with cardiomyopathy and MI. Methods and Results Patients were divided into 2 groups: patients with cardiomyopathy (group CM, n=21, male =13), and patients with MI (group MI, n=36, male =28). TCRT was calculated using a custom software package. The ventricular gradient (VG)-index was defined as the total number of leads with opposite vectors for the QRS and T-wave. The value of TCRT was significantly lower in group CM than in group MI (-0.50±0.51 vs -0.04±0.65, p
ISSN:1346-9843
1347-4820
DOI:10.1253/circj.70.1322