NDLI: Changes in left ventricular size during parabolic flights by two-dimensional echocardiography and level set method

Content Provider	IEEE Xplore Digital Library
Author	Corsi, C. Saracino, G. Lamberti, C. Cerutti, S. Bailliart, O. Cholley, B. Capderou, A. Vaida, P. Caiani, E.G.
Copyright Year	2002
Description	Author affiliation: Dipt. di Elettronica, Inf. e Sistemistica, Bologna Univ., Italy (Corsi, C.; Saracino, G.; Lamberti, C.)
Abstract	This study aims to evaluate changes on cardiac chambers size, induced by gravitational stresses. During parabolic flight, seven subjects underwent 2-D transthoracic echocardiography at three different gravity phases (1 Gz, 1.8 Gz, and 0 Gz). LV endocardial borders were detected applying a semi-automatic segmentation procedure based on level set methods. LV cavity area was computed frame-by-frame for a whole cardiac cycle during each gravity phase. Expected modifications in LV area with different gravity were found: at 1.8 Gz, end-diastolic (ED) and end-systolic (ES) areas were significantly (p<0.05) reduced of 10.7/spl plusmn/5.4% and 21.6/spl plusmn/11.1% respectively, compared to 1 Gz values, while they were increased of 11.2/spl plusmn/5.4% and 11.1/spl plusmn/6% during 0 Gz. Fractional area change was augmented of 20.9/spl plusmn/29.1% at 1.8 Gz, while it remained unchanged at 0 Gz, compared with 1 Gz values. Furthermore, LV filling due to atrial contraction was increased at 0 Gz of 39/spl plusmn/35.6%.
Starting Page	73
Ending Page	76
File Size	322476
Page Count	4
File Format	PDF
ISBN	0780377354
ISSN	02766547
DOI	10.1109/CIC.2002.1166710
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-09-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Echocardiography Level set Gravity Cardiology Stress Filling Biomedical imaging Medical diagnostic imaging Aircraft Data mining
Content Type	Text
Resource Type	Article

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