IS HEART RATE VARIABILITY A VALUABLE METHOD TO INVESTIGATE CARDIAC AUTONOMIC DYSFUNCTION IN SUBJECTS WITH LEUKEMIA? A SYSTEMATIC REVIEW TO EVALUATE ITS IMPORTANCE IN CLINICAL PRACTICE Heart Rate Variability and leukemia

1Autonomic Nervous System Center, Sao Paulo State University, UNESP, Presidente Prudente, SP, Brazil. 2Cardiorespiratory Research Group, Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University, Headington Campus, Gipsy Lane, Oxford, OX3 0BP, United Kingdom. 3Department of Medicine (Cardiology), Federal University of São Paulo (UNIFESP), Sao Paulo, SP, Brazil.