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Phasic Coronary Flow Patterns in Human Left and Right Epicardial Coronary Arteries Megumi Shimada 1 , Koji Negishi 2 , Yasushi Asakura 1 , Sumihisa Abe 3 , Hideo Mitamura 1 , Satoshi Ogawa 1 , Shunnosuke Handa 3 1Cardiopulmonary Division, Department of Internal Medicine, School of Medicine, Keio University 2Division of Cardiology, Yokohama Municipal Citizen's Hospital 3Department of Internal Medicine I, School of Medicine, Tokai University Keyword: ドプラガイドワイヤー , 冠循環 , 冠血流速波形 , Doppler guide wire , coronary circulation , phasic flow pattern pp.171-175
Published Date 1997/2/15
DOI https://doi.org/10.11477/mf.1404901421
  • Abstract
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The aim of this study was to clarify the difference of phasic flow patterns between left and right human epicardial coronary arteries using an intravascular Doppler guidewire (Cardiometrics Inc.). We measured coronary flow velocity in 24 angiographically normal epicardial arteries (14 right coronaries (RCA), 10 left anterior descending (LAD)). The flow velocity integral during systole (SPVI) and diastole (DPVI) were calcu-lated. We used DPVI/SPVI (D/S) as a parameter for phasic coronary blood flow pattern. The proximal RCA and rigit ventricular branch (RV) had low D/S of 2.36± 0.21 and 1.80±0.36, but distal RCA had higher D/S of 3.26±0.20 than the former. As for distal RCA, the post-erior descending artery (4PD: 8 arteries), having septal branches, had a higher D/S than the posterior left ventricular artery (4AV: 6 arteries) (D/S in 4PD 3.66± 0.21 vs. 4AV 2.85±0.26, p<0.05). The proximal and distal LAD, having septal branches, also showed a significant diastolic predominance with D/S of 5.15± 0.50 and 5.48±0.44, respectively. Septal branches (SB) characteristically showed diastolic predominance with the highest D/S of 7.96±1.34. In comparison, the distal segments of RCA showed less diastolic predominance than the distal LAD. We conclude that the septal branch flow, having the most diastolic-predominance, RV flow with low D/S, and distal RCA flow, having lower D/S than distal LAD, affect the phasic flow pattern of each epicardial coronary artery.


Copyright © 1997, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1200 印刷版ISSN 0452-3458 医学書院

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