Journal of internal medicine
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To measure QT interval and QT dispersion, and to evaluate possible relationships between these measurements, heart rate variability parameters, and early myocardial involvement in patients with systemic sclerosis (SSc). ⋯ Patients with SSc have increased QTc interval, QT dispersion, and QTc dispersion. The role of autonomic nervous system and myocardial involvement on ventricular repolarization in patients with SSc needs further investigation.