Preoperatively decreased heart rate variability is a potential independent predictor of postoperative long-term mortality, though further studies are needed to establish its clinical value.
Does preoperative heart rate variability assessment predict postoperative long-term mortality in surgical patients?
Preoperative heart rate variability may be a valuable tool for long-term postoperative risk stratification, though further studies are needed.
There is growing evidence of a strong association between the compromised autonomic nervous system and sudden cardiac death. Heart rate variability (HRV) measures are widely used to measure alterations in the autonomic nervous system. Several studies with cardiac patients show that decreased HRV as well as baroreceptor dysfunction are more powerful predictors for sudden cardiac death than established clinical predictors such as left ventricular ejection fraction. One-third of all postoperative complications and more than half of the deaths are due to cardiac complications. Several risk indices are useful for immediate perioperative short-term, but not for long-term outcome risk stratification of an individual patient. Currently, there are no clinically assimilated methods for long-term postoperative risk assessment. Recently, few studies have shown that preoperatively decreased HRV can independently predict postoperative long-term mortality. Further studies with surgical patients are needed to establish a possible predictive value of preoperative baroreceptor dysfunction, alone and combined with HRV, for short- and long-term postoperative outcome.
Laitio et al. (Sat,) conducted a review in Postoperative cardiac events. Heart rate variability (HRV) was evaluated. Preoperatively decreased heart rate variability is a potential independent predictor of postoperative long-term mortality, though further studies are needed to establish its clinical value.