Reduced<unk>  has been shown to be a predictor of mortality after myocardial infarction although others have shown that the information in<unk>  relevant to acute myocardial infarction survival is fully contained in the mean<unk> <unk> . A range of other outcomes and conditions may also be associated with modified (usually lower)<unk> , including congestive<unk>  failure, diabetic neuropathy, post–cardiac-transplant depression, susceptibility to SIDS and poor survival in premature babies, as well as fatigue severity in chronic fatigue syndrome.
Heart rate variability
Basal rate
Cardiac reserve
QT interval variability
Electrodermal activity
Vagal tone
Cerebral autoregulation
Coronary perfusion pressure