Single systemic right ventricle longitudinal strain: Intravendor reproducibility and intervendor agreement in children

Autor:	Ricardo H. Pignatelli, Asela M. Liu, Robert W. Loar, J. Chris Wilkinson, John L. Colquitt
Rok vydání:	2021
Předmět:	Longitudinal strain Intraclass correlation Heart Ventricles 030204 cardiovascular system & hematology Right ventricles Ventricular Function Left 030218 nuclear medicine & medical imaging Hypoplastic left heart syndrome 03 medical and health sciences 0302 clinical medicine Heart Rate Heart rate Humans Medicine Radiology Nuclear Medicine and imaging Child Observer Variation Reproducibility business.industry Reproducibility of Results Strain imaging medicine.disease medicine.anatomical_structure Echocardiography Ventricle Child Preschool Cardiology and Cardiovascular Medicine business Nuclear medicine Software
Zdroj:	Echocardiography. 38:402-409
ISSN:	1540-8175 0742-2822
DOI:	10.1111/echo.14985
Popis:	PURPOSE Strain derived from speckle-tracking echocardiography is emerging as a useful tool in the assessment of single ventricle function. The purpose of this study is to compare layer-specific longitudinal strain values in children with single, systemic right ventricles (sRV) using two commercially available software platforms (GE EchoPAC (EP) and TomTec (TT)). METHODS Two readers analyzed two-dimensional longitudinal strain on EP (v 202) and TT (v 2.21.25) in 40 pediatric sRV patients. Intravendor reproducibility and intervendor agreement between layer-specific measurements were assessed by intraclass correlation coefficient and Bland-Altman analysis. Absolute difference (AbΔ) and relative mean errors (RME) were calculated. Subgroup comparisons (stratified by age, heart rate (HR), and frames per second (FPS): HR ratio) were made. RESULTS Median age was 4.4 years. 32 (80%) patients had hypoplastic left heart syndrome; 19 (48%) were post-Fontan. Intravendor reproducibility was excellent with high ICC (0.86-0.97). AbΔ between readers was small (1.2%-1.5%) with interobserver RME slightly higher for TT (11%-12% vs 8%-9% for EP). Layer-specific intervendor agreement was poor (ICC 0.45-0.62). Default layer comparisons (EP mid vs TT endo) showed good agreement (ICC 0.72-0.77) and less variability (AbΔ 2%, RME 15%) than layer-to-layer. There were no differences in ICC for groups dichotomized by age, HR, or FPS:HR ratio. sRV strain values are more negative when using EP. CONCLUSION Intravendor reproducibility for sRV peak longitudinal strain in children is excellent with acceptable variability between experienced users. Intervendor, layer-specific strain agreement is poor. Vendor default layer strain values show better agreement but are not interchangeable.
Databáze:	OpenAIRE
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