NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Quantitative analysis of aortic regurgitation: real-time 3-dimensional and 2-dimensional color Doppler echocardiographic method--a clinical and a chronic animal studyBACKGROUND: For evaluating patients with aortic regurgitation (AR), regurgitant volumes, left ventricular (LV) stroke volumes (SV), and absolute LV volumes are valuable indices. AIM: The aim of this study was to validate the combination of real-time 3-dimensional echocardiography (3DE) and semiautomated digital color Doppler cardiac flow measurement (ACM) for quantifying absolute LV volumes, LVSV, and AR volumes using an animal model of chronic AR and to investigate its clinical applicability. METHODS: In 8 sheep, a total of 26 hemodynamic states were obtained pharmacologically 20 weeks after the aortic valve noncoronary (n = 4) or right coronary (n = 4) leaflet was incised to produce AR. Reference standard LVSV and AR volume were determined using the electromagnetic flow method (EM). Simultaneous epicardial real-time 3DE studies were performed to obtain LV end-diastolic volumes (LVEDV), end-systolic volumes (LVESV), and LVSV by subtracting LVESV from LVEDV. Simultaneous ACM was performed to obtain LVSV and transmitral flows; AR volume was calculated by subtracting transmitral flow volume from LVSV. In a total of 19 patients with AR, real-time 3DE and ACM were used to obtain LVSVs and these were compared with each other. RESULTS: A strong relationship was found between LVSV derived from EM and those from the real-time 3DE (r = 0.93, P <.001, mean difference (3D - EM) = -1.0 +/- 9.8 mL). A good relationship between LVSV and AR volumes derived from EM and those by ACM was found (r = 0.88, P <.001). A good relationship between LVSV derived from real-time 3DE and that from ACM was observed (r = 0.73, P <.01, mean difference = 2.5 +/- 7.9 mL). In patients, a good relationship between LVSV obtained by real-time 3DE and ACM was found (r = 0.90, P <.001, mean difference = 0.6 +/- 9.8 mL). CONCLUSION: The combination of ACM and real-time 3DE for quantifying LV volumes, LVSV, and AR volumes was validated by the chronic animal study and was shown to be clinically applicable.
Document ID
20040088134
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Shiota, Takahiro (The Cleveland Clinic Foundation 9500 Euclid Avenue, Cleveland, OH 44195, United States)
Jones, Michael
Tsujino, Hiroyuki
Qin, Jian Xin
Zetts, Arthur D.
Greenberg, Neil L.
Cardon, Lisa A.
Panza, Julio A.
Thomas, James D.
Date Acquired
August 21, 2013
Publication Date
September 1, 2002
Publication Information
Publication: Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography
Volume: 15
Issue: 9
ISSN: 0894-7317
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other
Keywords
Validation Studies
Non-NASA Center
NASA Discipline Cardiopulmonary