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Dual pulsed-wave Doppler tracing of right ventricular inflow and outflow: single cardiac cycle right ventricular tei index and evaluation of right ventricular function.
MedLine Citation:
PMID:  20830253     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
BACKGROUND AND OBJECTIVES: The reliability and usefulness of the right ventricular (RV) Tei index (RTX) remains controversial because it has not been possible to simultaneously measure RV inflow and outflow. However, dual pulsed-wave Doppler (DPD) enables flow velocities to be obtained at different sampling sites simultaneously. In this study we evaluated the feasibility and reliability of RTX values obtained by DPD (RTX(DPD)).
SUBJECTS AND METHODS: Forty-one patients who underwent cardiac catheterization and echocardiography for RV volume or pressure overloading conditions were evaluated. Symptom-limited exercise treadmill testing with expired gas analysis was performed and maximal exercise capacity was measured.
RESULTS: RTX by conventional flow Doppler (RTX(CFD), 0.262±0.164) was similar to RTX(DPD) (0.253±0.117, p=NS), whereas RTX by tissue Doppler echocardiography (RTX(TDE), 0.447±0.125) was significantly larger than RTX(DPD) (p<0.001). Based on multiple regression analysis, maximal exercise capacity was independently related to RTX(DPD) (β=-0.60, p<0.001), mid-RV dimension (β=-0.26, p=0.012), left ventricular ejection fraction (β=0.22, p=0.023), and early diastolic tricuspid annular velocity (β=0.21, p=0.048).
CONCLUSION: It is feasible and reliable to evaluate RV function using RTX(DPD) values. However, to evaluate the clinical usefulness of RTX(DPD), additional studies are required with a large number of patients and long-term follow-up.
Authors:
Jin-Oh Choi; Joon Hyouk Choi; Hyun Jong Lee; Hye Jin Noh; June Huh; I Seok Kang; Heung Jae Lee; Sang-Chol Lee; Duk Kyung Kim; Seung Woo Park
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Publication Detail:
Type:  Journal Article     Date:  2010-08-31
Journal Detail:
Title:  Korean circulation journal     Volume:  40     ISSN:  1738-5555     ISO Abbreviation:  Korean Circ J     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-09-10     Completed Date:  2011-07-14     Revised Date:  2013-05-29    
Medline Journal Info:
Nlm Unique ID:  101247141     Medline TA:  Korean Circ J     Country:  Korea (South)    
Other Details:
Languages:  eng     Pagination:  391-8     Citation Subset:  -    
Affiliation:
Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
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