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1996 Fiscal Year Final Research Report Summary

The developement of simple method for measuring coronary flow reserve and the clinically useful diagnosis of ischemia using NH_3 myocardial PET

Research Project

Project/Area Number 06670905
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Radiation science
Research InstitutionUniveristy of Tokyo

Principal Investigator

OHTAKE Tohru  University of Tokyo, Faculty of Medicine, lecturer, 医学部・附属病院, 講師 (80152164)

Project Period (FY) 1994 – 1996
KeywordsNitrogen-13 ammonia / positron emission computed tomography / myocardium / coronary flow reserve / ischemic heart disease / atherosclerosis / hypercholesterolemia
Research Abstract

From research result until now, we experianced the coronary flow reserve (CFR) often reduce in non-diseased area without significant coronary stenosis in patients with atherosclerotic resk factors such as hyperlipidemia and dibetes mellitus. We measured flow reserve in patients with familial hypercholesterolemia (FH) because there maybe possibility that flow reserve measurement at dipyridamole stress is related to the early diagnosis of atherosclerosis.
Methods : Twenty -five patients with FH (14 men, 11 women) without history of myocardial ischemia and 14 control subjects (9 men and 5 women) were studied. Total serum cholesterol (mmole/liter) was 5.33(]SY.+-。[)0.66 in control subjects and 7.90(]SY.+-。[)0.77 in FH patients (p<0.01). Results : Myocardial blood flow (MBF) at rest and during dipyridamole loading was measured using PET,and CFR was calculated. MBF (ml/min/100g weight heart) at rest in the FH group (79.0(]SY.+-。[)20.0) was comparable to that in control subjects (70.0(]SY.+-。[ … More )17.0). However, MBF during dipyridamole loading was significantly lower in FH patients (163.0(]SY.+-。[)67.0) than in control subjects (286.0(]SY.+-。[)120.0, p<0.01). CFR in FH patients (2.09(]SY.+-。[)0.62) was also significantly lower than in control subjects (4.13(]SY.+-。[)1.38, p<0.01). CFR showed a gender-specific variance in FH patients (1.85(]SY.+-。[)0.40 in men versus 2.55(]SY.+-。[)0.74 in women p<0.05) but not in control subjects. Significant inverse correlations between CFR and the total plasma chilesterol level as well as prasma LDL,cholesterol were observed. Conclusion : In FH,coronary arterial voasodilating effect to dipyridample may be reduced by asymptomatic atherosclerosis of coronary artery. We showed the possibility that the measurement of coronary flow reserve during dipyridamole loading maybe useful in early diagnosis of coronary arterial atherosclerosis and the evaluation of improvement of atheroscierosis by medical treatment of hyperlipidemia. In future, as to other risk factors of atheroscierosis such as diabetes mellitus, obesity hypertension and tobaco, we will try to evaluate whether this method is useful in early diagnosis of coronary arterial atherosclerosis and the evaluation of improvement of atherosclerosis by medical treatment of risk factors. Less

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] Ikuo Yokoyama,Tohru Ohtake et al: "Reduced coronary flow reserve in familiol hypercholestero lemia" Journal of Nuclear Medicine. 37. 1937-1942 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ikuo Yokoyama,Tohru Ohtake et al: "Reduced coronary flow reserve in hyper cholesterolemic patients without overt coronary stenosis" Circulation. 94. 3232-3238 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ikuo Yokoyama, Tohr., Ohtaka et al: "Reduced Coronary flow reserve in familiol hypercholesterolemia" Jounal of Nuclear Medicin. 37. 1937-1942 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ikuo Yokoyama, Tohru., Ohtaka et al: "Reduced Coronary flow reserve in hypercholesterolemic patients without overt Coronary Stenosis" Circulation. 94. 3252-3238 (1996)

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

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Published: 1999-03-09  

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