Heart rate variability (HRV) is a predictor of mortality and morbidity after non-lethal cardiac
ischemia, but the relation between preoperatively measured HRV and intra-and …

Surgery is a common first-line treatment for many types of disease, including cancer.
Mortality rates after general elective surgery have seen significant decreases whilst …

Background Surgery is a major physiologic stress comparable to intense exercise.
Diminished cardiopulmonary reserve is a major predictor of poor outcomes. Current …

The value of more elaborate HRV measures as shown in Figure 1 in predicting intra-
operative hypotension has mainly been studied in caesarean section where Chamchad et …

Background Vagal activity is critical for maintaining key body functions, including the stability
of inflammatory control. Its weakening, such as in the aftermatch of a surgery, leaves the …

Background Postoperative hypotension is common after major surgery and is associated
with patient harm. Vasopressors are commonly used to treat hypotension without clear …

Evidence for a key role of dysregulated autonomic nervous system (ANS) activity in
maladaptive stress response/recovery and non-communicable disease development is …

Objectives: Physiologic signals are typically measured continuously in the critical care unit,
but only recorded at intermittent time intervals in the patient health record. Low frequency …

1. Background Surgery produces tissue injury that can elicit sympathovagal imbalance,
ultimately affecting cardiac autonomic function. 15, 34 Unfortunately, after noncardiac …

Heart rate variability (HRV) is a measure that shows the variation in time between
consecutive heartbeats–a physiological phenomenon controlled by the autonomic nervous …