Is the technically limited echocardiographic study an endangered species? endocardial border definition with native tissue harmonic imaging and Optison contrast: a review of 200 cases.
OBJECTIVE
Our goal was to determine whether contrast adds diagnostic value to both fundamental and native tissue harmonic imaging (NTHI) for endocardial border definition.


METHODS
Two hundred consecutive patients who underwent stress echocardiography imaging were studied in either fundamental (n = 52) or NTHI mode (n = 148) with an Acuson Sequoia echocardiographic system. Contrast agent (Optison) was administered (0.5 to 1 mL) for enhancement of endocardial borders. Two- and 4-chamber views were analyzed before and after administration of contrast at peak stress for grading of 5 endocardial border segments. Scores from 0 to 5 were assigned to each study for all the images both before and after contrast (0 = 0 segments completely visualized; 5 = 5 segments completely visualized).


RESULTS
The use of Optison contrast significantly enhanced border definition when imaging was performed in either fundamental or NTHI mode. Addition of contrast resulted in better endocardial border definition in fundamental mode (4.1 + or - 1.0 versus 2.3 + or - 1.3, P <.001). However, in NTHI mode, the presence of contrast resulted in enhanced definition of endocardial border compared with its absence (4.8 + or - 0.5 versus 3.3 + or - 1.1, P <.001). The combination of NTHI and contrast resulted in more visualization of endocardium when compared with the combination of fundamental imaging and contrast (4.8 + or - 0.5 versus 4.1 + or - 1.0, P <.001). In addition, interobserver agreement for border detection increased from 83% in fundamental mode without contrast to 95% with the use of NTHI with Optison (P <.001).


CONCLUSIONS
As defined in 200 cases, the combination of NTHI with Optison contrast results in nearly complete and consistent endocardial border definition.
Section of Cardiovascular Medicine, University of Illinois, Chicago, USA.
V
V
Malhotra
J
J
Nwogu
M D
MD
Bondmass
M
M
Bean
T
T
Bieniarz
M
M
Tertell
M
M
Conliss
S
S
Devries
D000418:Albumins / Q000008:administration & dosage; D003287:Contrast Media; D004452:Echocardiography / Q000379:methods*; D004699:Endocardium / Q000000981:diagnostic imaging*; D005260:Female; D005466:Fluorocarbons / Q000008:administration & dosage; D006331:Heart Diseases / Q000000981:diagnostic imaging; D006352:Heart Ventricles / Q000000981:diagnostic imaging*; D006801:Humans; D007275:Injections, Intravenous; D008297:Male; D008863:Microspheres; D015588:Observer Variation; D015203:Reproducibility of Results; D012189:Retrospective Studies
D000418:Albumins; D003287:Contrast Media; C099458:FS 069; D005466:Fluorocarbons