Quantitative analysis of aortic regurgitation: Real-time 3-dimensional and 2-dimensional color Doppler echocardiographic method - A clinical and a chronic animal study

Takahiro Shiota*, Michael Jones, Hiroyuki Tsujino, Jian Xin Qin, Arthur D. Zetts, Neil L. Greenberg, Lisa A. Cardon, Julio A. Panza, James D. Thomas

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Background: 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 realtime 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.

Original languageEnglish (US)
Pages (from-to)966-971
Number of pages6
JournalJournal of the American Society of Echocardiography
Volume15
Issue number9
DOIs
StatePublished - Jan 1 2002

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine

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