Heart Rate Variability Markers as Correlates of Survival in Recipients of Hematopoietic Cell Transplantation

OBJECTIVES: To assess pre-/post-transplantation changes in autonomic tone, as measured by heart rate variability (HRV), among patients undergoing hematopoietic cell transplantation (HCT) and to look at those changes as they relate to post-transplantation survival rates. 
. SAMPLE A SETTING: Data were derived from a sample of 27 English-speaking patients undergoing allogeneic or autologous HCT at Stanford University. 
. METHODS A VARIABLES: A survival analysis using the Kaplan-Meier estimator was employed to explore whether increased HRV would enhance survival probabilities over time among patients undergoing HCT.
. RESULTS: An increased probability of survival was significantly related to increases in two HRV indexes. IMPLICATIONS FOR NURSING: HRV may be a useful predictor of mortality among patients undergoing HCT. Interventions deliverable by nurses could be used to enhance HRV for patients identified as being at risk for early mortality.