Heart rate variability in the risk stratification of emergency department patients with chest pain

Heart rate variability (HRV) is a physiologic parameter that is altered in many conditions including heart disease, hypertension, hyperlipidemia, obesity, smoking and diabetes and is associated with increased mortality in patients following myocardial infarction [6-15]. [...]work on this topic may focus on how HRV parameters can be used in the context of risk factor assessment in clinical decision rules.Acknowledgements This study was supported by the University of Iowa Department of Emergency Medicine, the University of Iowa Carver College of Medicine, and the National Center for Advancing Translational Science (NIH training grant 2T35HL007485-36). Beta (95% confidence interval) P-value DM TP −1247.335 (−2345.553, −149.117) 0.027 LF/HF −0.455 (−1.523, 0.613) 0.397 LF −530.759 (−949.670, −111.848) 0.014 HF −156.675 (−442.764, 129.412) 0.278 HLD TP −686.362 (−1712.848, 340.124) 0.186 LF/HF −0.462 (−1.433, 0.507) 0.344 LF −99.083 (−499.744, 301.576) 0.622 HF −207.737 (−464.840, 49.365) 0.111 HTN TP −1406.5 (−2393.768, −419.232) 0.006 LF/HF 0.094 (−0.894, 1.083) 0.849 LF −318.888 (−716.272, 78.494) 0.114 HF −265.069 (−521.639, −8.500) 0.043 Family history TP −324.127 (−1358.742, 710.486) 0.533 LF/HF 0.007 (−0.966, 0.980) 0.988 LF 95.639 (−303.495, 494.774) 0.633 HF −44.545 (−306.085, 216.994) 0.734 Obesity TP −715.400 (−1736.345, 305.544) 0.166 LF/HF 0.345 (−0.624, 1.315) 0.478 LF −155.909 (−553.729, 241.911) 0.436 HF −225.488 (−480.493, 29.517) 0.082 Smoking TP −450.3, (−1505.960, 605.280) 0.397 LF/HF 0.392, (−0.599, 1.383) 0.432 LF 68.82, (−399.997, 477.635) 0.737 HF −141.21, (−406.51, 124.09) 0.291 Table 5 Association between cardiovascular risk factors and heart rate variability.