In one aspect of the invention, there is provided a method and apparatus for
early detection of subacute, potentially catastrophic
infectious illness in a premature
newborn infant. The method comprises: (a) continuously monitoring
heart rate variability in the premature
newborn infant; and (b) identifying at least one characteristic
abnormality in the
heart rate variability that is associated with the illness. This method can be use to diagnose illnesses such as, but not limited to,
sepsis,
necrotizing enterocolitis, pneumonia and
meningitis. In another aspect of the present invention, there is provided a method and apparatus for
early detection of subacute, potentially catastrophic
infectious illness in a patient. The method comprises: (a) continuously monitoring the patient's RR intervals; (b) generating a normalized
data set of the RR intervals; (c) calculating one or more of (i) moments of the
data set selected from the third and higher moments and (ii) percentile values of the
data set; and (d) identifying an
abnormal heart rate variability associated with the illness based on one or more of the moments and the percentile values.