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Intensive care

G/TUES/INC1 HEART RATE VARIABILITY IN CHILDREN POST CARDIAC BYPASS SURGERY
L. McGlone, N. Patel, M. Danton.Royal Hospital for Sick Children, Glasgow, UK

Objective: Changes in heart rate variability (HRV) may be useful predictors of outcome in cardiac disease and following surgery. This is the first study to investigate changes in HRV in children in the immediate 24 h following cardiac surgery.

Methods: Twenty seven children (age one month to 15 years) undergoing cardiac surgery were recruited over a 10-month period. Complete data were obtained for 20 children, all of whom underwent surgery requiring a period of cardiac bypass. HRV was measured for one hour preoperatively and continuously for 24 h postoperatively. Time domain and frequency domain analyses of HRV were performed.

Results: Time domain analysis revealed a significant reduction in HRV measures at all time points postoperatively, compared to preoperative values. There was a significant association between one of the time domain measures (SDNNi) and duration of cardiac bypass . . . [Full text of this article]