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Am J Physiol Heart Circ Physiol (December 4, 2003). doi:10.1152/ajpheart.00819.2003
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Submitted on August 26, 2003
Accepted on December 3, 2003

Coronary artery diameter can be assessed reliably with transthoracic echocardiography

Tuomas O. Kiviniemi1*, Markku Saraste1, Juha W. Koskenvuo1, K.E. Juhani Airaksinen2, Jyri O. Toikka1, Antti Saraste3, Jussi Parkka1, and Jaakko J. Hartiala1

1 Department of Clinical Physiology, Nuclear Medicine and PET, Turku University Hospital, Turku, Finland
2 Department of Medicine, Turku University Hospital, Turku, Finland
3 Department of Medicine, Turku University Hospital, Turku, Finland; Department of Clinical Physiology, Nuclear Medicine and PET, Turku University Hospital, Turku, Finland

* To whom correspondence should be addressed. E-mail: tuoski{at}utu.fi.

We studied whether diameters of coronary arteries can be measured accurately with the use of transthoracic echocardiography (TTE). By knowing the anatomical diameter of the coronary artery together with coronary flow velocity it would be possible to measure coronary flow volume more precisely by TTE. However, the suitability of TTE for measurement of diameters of all main epicardial coronary arteries has not been systematically validated. We measured the diameters of the left main (LM), left anterior descending (LAD), left circumflex (LCX) and right coronary arteries (RCA) with the use of TTE (manual-2D, color-Doppler and automated 2D analysis) in 30 patients who had normal coronary anatomy. We compared these diameters to those measured with quantitative coronary angiography. We could measure diameters of LM, LAD, LCX and RCA by TTE in up to 37 %, 63 %, 7% and 60 % of patients, respectively. The overall correlation coefficients between TTE and QCA measurements were 0.83 (p<0.01) using manual-2D analysis, 0.82 (p<0.01) using automated 2D analysis, and 0.94 (p<0.01) using a color-Doppler based analysis. Interobserver variability of TTE measurements was low (CV 5.7 ± 5.6 - 7.0 ± 8.6 %). TTE is an accurate method to evaluate coronary artery diameter in patients with healthy coronary arteries.




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