Document Detail

Optimization of myocardial deformation imaging in term and preterm infants.
MedLine Citation:
PMID:  21257626     Owner:  NLM     Status:  Publisher    
AIMS: Myocardial deformation imaging is now used to assess regional ventricular function in infants but their small size presents particular technical challenges. We therefore investigated the determinants of reproducibility of myocardial longitudinal strain (ε) in term and preterm infants, in order to determine optimal technical settings. METHODS AND RESULTS: Repeated longitudinal ε measurements of the mid-segments of the septum, and the left and right ventricular free walls, were performed using five different computation distances (CDs; also called strain length) in 20 infants. The coefficients of variation (CV) were calculated for each CD. Overall, ε measurements were most reproducible with a CD of 6 mm (CV 11.7%). In preterm infants (<34 weeks gestation; mean ± SD diastolic LV length, 20.3 ± 3.5 mm), ε measurements were most reproducible with CD of 6 mm (CV 7.2%); in term infants (>37 weeks gestation; mean ± SD diastolic LV length, 29.6 ± 3.0 mm), ε measurements were most reproducible with CD of 10 mm (CV 13.2%). The reproducibility of measuring ε increased with higher frame rates, from CV of 17.3% at frame rates <180 per s to 11.7% for frame rates >180 per s and 9.6% for rates >248 per s. CONCLUSION: In newborn infants, tissue Doppler loops should be acquired at frame rates above 180 per s. Myocardial deformation analysis of preterm infants should be performed using a CD of 6 mm, whereas a CD of 10 mm is more reproducible in term infants.
Chuen Y Poon; Julie M Edwards; Suchita Joshi; Sailesh Kotecha; Alan G Fraser
Related Documents :
11917736 - Update on the etiologies and management of neonatal cholestasis.
24931326 - The molecular era of surfactant biology.
8846156 - Hepatic concentrations of zinc, copper and manganese in infants with extrahepatic bilia...
19517266 - Neonatal intrahepatic cholestasis caused by citrin deficiency (niccd) as a cause of liv...
12213506 - The development of infants' circadian rest-activity rhythm and mothers' rhythm.
10097816 - The fetal and neonatal consequences of maternal alloimmune thrombocytopenia.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-1-21
Journal Detail:
Title:  European journal of echocardiography : the journal of the Working Group on Echocardiography of the European Society of Cardiology     Volume:  -     ISSN:  1532-2114     ISO Abbreviation:  -     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2011-1-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100890618     Medline TA:  Eur J Echocardiogr     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Child Health, School of Medicine, Cardiff University, Cardiff, UK.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Arsenic trioxide promotes senescence and regulates the balance of adipogenic and osteogenic differen...
Next Document:  What Intensivists Need to Know About Hemophagocytic Syndrome: An Underrecognized Cause of Death in A...