The Autonomic Nervous System in Early Life

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Abstract
Blood PressureA number of investigators have described the changes in systolic blood pressure during the first hours of life.6, 66 , 67 A more recent study confirmed these earlier descriptions of increased heart rate and blood pressure immediately after birth, both falling during the first few hours along with body temperature.66 The blood-pressure decrease, which often followed the other parameters, may have been related to the opening of pulmonary and intestinal vascular beds and possibly decreased plasma volume. Maintaining a constant body temperature did not modify the systolic blood-pressure changes. Toxemia, cesarean section and fetal distress have been associated with lower mean . . .