T-Wave Alternans in Nonpathological Preterm Infants.

Background: Sudden infant death syndrome is more frequent in preterm infants (PTI) than term infants and may be due to cardiac repolarization instability, which may manifest as T-wave alternans (TWA) on the electrocardiogram (ECG). Therefore, the aim of the present work was to analyze TWA in nonpathological PTI and to open an issue on its physiological interpretation.

Methods: Clinical population consisted of ten nonpathological PTI (gestational age ranging from 29 to 34  weeks; birth weight ranging from 0.