1. Transthoracic Doppler Echocardiography as a Noninvasive Tool to Assess Coronary Artery Stenoses-A Comparison with Quantitative Coronary Angiography 
Markku Saraste, MD, Risto K. Vesalainen, MD, PhD, Antti Ylitalo, MD, PhD, Antti Saraste, MD, PhD, Juha W. Koskenvuo, MD, PhD, Jyri O. Toikka, MD, PhD, Mari-Anne Vaittinen, MD, Jaakko J. Hartiala, MD, PhD, K.E. Juhani Airaksinen, MD, PhD 
Journal of the American Society of Echocardiography 
Volume 18, Issue 6, Pages (June 2005)
DOI: /j.echo
Copyright © 2005 American Society of Echocardiography Terms and Conditions

2. Figure 1
Modified subcostal short-axis color Doppler view of distal right coronary artery stenosis (A). Open arrow, Normal slow prestenotic flow; open arrowheads, course of arterial lumen; white arrow, aliased and strong color Doppler signal caused by accelerated flow at site of stenosis. B, Same stenosis as seen in coronary angiography (white arrow). C, Measurement of peak flow velocity by pulsed wave Doppler immediately proximal to stenosis and at site of stenosis (D). Maximal stenotic flow velocity is 1.62 m/s and prestenotic flow velocity is 0.18 m/s, resulting in maximal-to-prestenotic flow velocity ratio of 9.0 and indicating presence of significant stenosis. Asterisk, Liver; RA, right atrium.
Journal of the American Society of Echocardiography  , DOI: ( /j.echo )
Copyright © 2005 American Society of Echocardiography Terms and Conditions

3. Figure 2
Left parasternal short-axis color Doppler view of septal branches of left anterior descending artery in patient with total occlusion of right coronary artery (A) and in patient with healthy coronary arteries (B). Note increased coronary blood flow velocity in presence of coronary occlusion. Long segment of flow in single imaging plane can be seen in presence of occlusion, whereas normal slow blood flow can be seen only in short segment of septal arteries.
Journal of the American Society of Echocardiography  , DOI: ( /j.echo )
Copyright © 2005 American Society of Echocardiography Terms and Conditions