Jones, Jenna B Decreased heart rate variability is associated with increased transcranial Doppler velocities in children with sickle cell disease. [electronic resource] - Ethnicity & disease 2014 - 451-5 p. digital Publication Type: Journal Article ISSN: 1049-510X Subjects--Topical Terms: AdolescentAnemia, Sickle Cell--complicationsBlood Flow Velocity--physiologyBlood Pressure--physiologyBlood Pressure Monitoring, AmbulatoryCerebrovascular Circulation--physiologyChildCircadian Rhythm--physiologyFemaleHeart Rate--physiologyHumansMaleMiddle Cerebral Artery--diagnostic imagingRetrospective StudiesUltrasonography, Doppler, Transcranial