[One-year observation of QT and corrected QT interval dispersion in patients with myocardial infarction].

The aim of the study was to evaluate, if the QT and corrected QT interval dispersion (QTd and QTcd) is a predictor of ventricular arrhythmia during one-year observation in patients with myocardial infarction (MI). Investigations were performed in 36 patients with MI, including 22 men and 14 women, aged 40-84 years. Considered criteria was: sex, MI location, applied/non applied thrombolytic treatment, after which patients were classified into 6 groups. I group--14 women aged 45-84. II group--22 men aged 40-71. III group--22 patients aged 43-68 with inferior wall MI (IMI). IV group--14 patients aged 40-84 with anterior wall MI (AMI). V group--29 patients aged 40-72 with MI treated thrombolytically. VI group--7 patients aged 43-84 with MI, not treated thrombolytically. Control group consisted of 15 healthy persons, aged 27-64. Standard 12-outputs ECG was performed on the 10nd day after admission to the hospital. For further observation ECG is provided within the 6th week, 3rd month, 6th month and 12th month after admission to the hospital were used. Holter monitoring was also performed on the 10nd day and 12th month after admission to the hospital. In patients with MI, independently of its sex, location and treatment, QTd and QTcd was initially increased. In patients treated thrombolytically QTcd was significantly decreasing during following months of observation, what hasn't been observed in patients not treated thrombolytically. There was no correlation between QTd, QTcd and non-sustained ventricular tachycardia in patients with MI.