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[Cardiorespirography of the newborn infant at 12 hours of life].

The introduction of the cardiorespirogram more than twenty years ago provided a useful continous noninvasive monitoring technique of heart and respiratory functions. However, there are only few studies about recording of these parameters and the topic is often partially discussed. Thus, the aim of this paper is to analyze the cardiorespirograms from newborn infants, divided into three groups: 50 normal fullterm infants, 28 preterm and 16 fullterm low birth weight infants. The age at monitoring was 12 hours. The 50 normal newborns reveal patterns similar to those described by other authors. The preterm and fullterm low birth weight infants show a significantly higher baseline with less variability and reactivity, data which lead us to bear in mind gestational age and birth weight to evaluate the cardiorespirogram.