title: Speckle Tracking Using Gray-Scale Information from Tissue Doppler Recordings versus Regular Gray-Scale Recordings in Term Neonates.
abstract: The use of 2-D strain speckle tracking echocardiography in B-mode images from tissue Doppler (TD) recordings was compared with its use in regular gray-scale (GS) recordings in healthy and asphyxiated neonates at days 1-3. Single-cycle and three-cycle longitudinal deformation indices were assessed. Median B-mode frame rates were 38/s (TD) and 77/s (GS). Systolic indices were similar for TD and GS recordings. Diastolic indices were lower for TD recordings. Single-cycle and three-cycle indices were equal. TD and GS recordings were similar in reproducibility, except for single-cycle inter-observer peak systolic strain rate and three-cycle intra-observer strain rate during atrial systole. Single-cycle reproducibility was lower than three-cycle reproducibility in all TD recording indices, GS recording inter-observer peak systolic strain and GS recording inter-observer early diastolic strain rate. Inter-observer reproducibility and intra-observer reproducibility were similar, except GS recording single-cycle peak systolic strain. In conclusion, use of TD and GS recordings interchangeably was feasible for systolic but not for diastolic indices. Three-cycle analyses improved reproducibility, especially in TD recordings.
authors: Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway; Department of Cardiology and Center for Cardiological Innovation, Oslo University Hospital, Rikshospitalet, Oslo, Norway; Department of Pediatrics, Vestfold Hospital Trust, Tønsberg, Norway. Electronic address: nestaas@hotmail.com.
authors: Eirik
authors: E
authors: Nestaas
authors: Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway; Department of Cardiology, St. Olav's Hospital, Trondheim, Norway.
authors: Asbjørn
authors: A
authors: Støylen
authors: Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway; Department of Neonatal Intensive Care, Oslo University Hospital, Ullevål, Oslo, Norway.
authors: Drude
authors: D
authors: Fugelseth
mesh_terms: D001238:Asphyxia Neonatorum / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D004452:Echocardiography / Q000379:methods*; D015150:Echocardiography, Doppler / Q000379:methods; D006321:Heart / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D006801:Humans; D007231:Infant, Newborn; D015588:Observer Variation; D015203:Reproducibility of Results
keywords: Cardiology; Deformation analysis; Echocardiography; Heart function; Infant; Myocardial function; Myocardial performance assessment; Repeatability; Speckle tracking echocardiography; Tissue Doppler imaging