The effect of coronary slow flow on ventricular repolarization parameters.
J Electrocardiol
; 78: 39-43, 2023.
Article
em En
| MEDLINE
| ID: mdl-36753857
ABSTRACT
INTRODUCTION:
Ischemia due to microvascular dysfunction may be responsible for the heterogeneity of ventricular repolarization in coronary slow flow. To our knowledge, there is no study in which QT interval, Tp-Te interval, index of cardiac-electrophysiological balance (iCEB), and frontal QRS-T angle were evaluated together in patients with CSF. In this study, we examined for the first time the relationship between all these myocardial repolarization parameters and CSF. MATERIALS ANDMETHODS:
The study group included 178 patients (99 female, mean age 50.6 ± 8.6 years) with isolated CSF without stenotic lesions and with angiographically proven normal coronary arteries. The control group included 120 patients (71 female, mean age 49.3 ± 9.4 years) with normal coronary angiography. QRS duration, QT interval, QTc interval, Tp-Te interval, Tp-Te/QT, Tp- Te/QTc, iCEB score, and frontal QRS-T angle were calculated from 12lead ECGs.RESULTS:
There was no significant difference in demographic parameters between the two groups. Compared with the control group, patients with CSF had significantly longer QTmax duration, QT dispersion, Tp-Te interval, and higher iCEB score, wider frontal QRS-T angle.CONCLUSION:
In our study, we found that many of the ventricular repolarization parameters were adversely affected in patients with CSF. Impaired parameters may be associated with the risk of malignant ventricular arrhythmias.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Arritmias Cardíacas
/
Eletrocardiografia
Limite:
Adult
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Female
/
Humans
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Middle aged
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article