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1992 Fiscal Year Final Research Report Summary

Noninvasive estimation of coronary stenotic lesion using two dimensional or Doppler echocardiograpy

Research Project

Project/Area Number 02454258
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Circulatory organs internal medicine
Research InstitutionKagawa Medical School

Principal Investigator

MATSUO Hirohide  Kagawa Medical School, Second Department of internal Medicine, Professor, 医学部, 教授 (90028514)

Co-Investigator(Kenkyū-buntansha) HIRABAYASHI Koichi  Kagawa Medical School, Second Department of internal Medicine, Research Associat, 医学部, 助手 (80240894)
FUKADA Hidetoshi  Kagawa Medical School, Second Department of internal Medicine, Research Associat, 医学部・附属病院, 助手 (20211518)
NAKAJIMA Shigeru  Kagawa Medical School, Second Department of internal Medicine, Research Associat, 医学部・附属病院, 助手 (80172310)
MORITA Hisaki  Kagawa Medical School, Second Department of internal Medicine, Assistant Profess, 医学部・附属病院, 講師 (70145051)
SENDA Syoichi  Kagawa Medical School, Second Department of internal Medicine, Assistant Profess, 医学部・附属病院, 助教授 (30145049)
Project Period (FY) 1990 – 1992
KeywordsTransesophageal Doppler echocardiography / Coronary stenosis / Transpulmonary contrast agents / Color Doppler method / Coronary intervension
Research Abstract

First, we found the acceleration phenomenon of peak blood flow velocity at left main trank (LMT) or proximal left desccending artery (LAD) stenosis using transesophageal pulsed Doppler echocardiography. This phenomenon allowed us to diagnose the stenosis in those arteries. Transesophageal color Doppler or pulsed Doppler echocardiography combined with the injection of ultrasound contrast agents passing through the pulmonary vascular bed into the peripheral veins enhanced the detection of the acceleration phenomenon. However, acceleration phenomenon was observed at less than 50% stenosis, thus false positive was occured. Therefore, we examined the problems of acceleration phenomenon in diagnosing coronary stenosis and also examined whether the siverity of coronary stenosis correlated with the acceleration ratio of the coronary flow velocity at the stenotic site. The coronary flow velocity accelerated more than twice at the stenotic site compared with the pre-stenotic site in over 90% of patients with over 75% stenosis, thus "more than twice acceleration of coronary flow velocity" could be a specific criterion for diagnosing significant coronary stenosis. The siverity coronary stenosis was not proportionate to the acceleration ratio of the coronary flow velocity. The reason was speculated that the pulsed Doppler method cann't always detect the highest velocity at the stenosis.
However, the acceleration ratio was available for estimating a change in the siverity of coronary stenosis in each indivisual patient. Since proximal LAD stenosis is a common target of coronary intervention, transesophageal Doppler echocardiography may be a useful tool for following up the proximal LAD lesions for which coronary intervention was undergone.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 森田 久樹: "ドプラー心エコー法による冠循環の評価" 超音波医学. 17. 21-22 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 平林 浩一: "経食道心エコー・ドップラー法による冠動脈の描出と血流計測:経胸壁法との対比" Journal of Cardiology. 21. 15-24 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 山田 節子: "経食道ドップラー心エコー図法による冠動脈血流波計と冠動脈計測に基づく左冠動脈狭窄病変の評価" Journal of Cardiology. 21. 539-549 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tanimoto T: "Circadian Variation of Coronary Artery Tone in Patients with Vasospastic Angina-Evaluated from Measurements of Left Main Trunk Diameter by M-mode Echocardiography" Abstract fo World Fed for Ultrasound in Med & Biol 1991. II. 1202- (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 谷本 哲子: "冠攣縮性狭心症における冠動脈トーヌスの日内変動の非侵襲的評価-Mモード心エコー法による左主幹部径の計測に基づく検討-" 脈管学. 33. 303-308 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 大森 浩二: "ニトログリセリン負荷時左冠動脈主幹部拡張率の心エコー図学的計測に基づく冠攣縮性狭心症の非侵襲的診断" Journal of Cardiology. 23(in press). (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Morita Hisaki: "Evaluation of coronary arterial flow dynamics by Doppler echocardiography" Japanese Journal of Medical Ultrasonics. 17. 21-22 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hirabayashi Koichi: "Imaging of coronary arteries and measurement of coronary flow using transesophageal Doppler echocardiography : A comparison with transthoracic doppler echocardiography" Journal of Cardiology. 21. 15-24 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yamada Setsuko: "Transesophageal Doppler echocardiographic imaging and blood flow measurements for the diagnosis of stenotic left coronary arteries" Journal of Cardiology. 21. 539-549 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tanimoto Tetsuko: "Circadian Variation of Coronary Artery Tone in Patients with Vasospastic Angina- Evaluated from Measurements of Left Main Trunk Diameter by M-mode Echocardiography" Abstract of World Fed for Ultrasound in Med & Biol 1991. II. 1202- (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tanimoto Tetsuko: "Circadian Variation of Coronary Artery Tone in Patients with Vasospastic Angina : Evaluated from Measurements of Left Main Trunk Diameter by M-mode Echocardiography" The Journal of Japanese College of Angiology. 33. 303-308 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ohmori Koji: "Noninvasive diagnosis of vasospastic angina : Echocardiographic assessment of nitroglycerin-induced dilatation of the left main coronary artery" Journal of Cardiology (in press). 23. (1993)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1996-04-15  

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