Effects of Nicorandil on Aortic Input Impedance : A Comparative Study With Nitroglycerin
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概要
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A study of aortic input impedance was performed to evaluate the effects of nicorandil on the systemic circulation, and the effects were compared with those of nitroglycerin. Sixteen patients with coronary artery disease were divided into 2 age-matched groups. Aortic input impedance was obtained from Fourier analysis of aortic pressure and flow signals at baseline conditions, after intravenous administration of either 4 mg(Group 1)or 8 mg(Group 2)nicorandil, and 20 min after 0.3 mg sublingual nitroglycerin. In Group 1, the first harmonic impedance modulus(Z_1, 304±140 dyne・s・cm^<-5>)and the average of the first to third harmonics(Z_<1-3>, 207±99 dyne・s・cm^<-5>), indices of wave reflection, significantly decreased(24.4%(p<0.05)and 24.7%(p<0.01), respectively)after nicorandil, and 41.3%(p<0.01)and 33.9%(p<0.01)after nitroglycerin. The effects between the 2 vasodilators were not significantly different. In Group 2, Z_1 and Z_<1-3>(275±138 and 196±93 dyne・s・cm^<-5>, respectively)also decreased after administration of nicorandil(28.4%(p<0.01)and 35.9%(p<0.01), respectively), and after administration of nitroglycerin(23.9%(p<0.01)and 28.7%(p<0.01), respectively), without any significant difference between the 2 drugs. Characteristic impedance and total peripheral resistance(R)in both groups remained unchanged except for R after 8 mg nicorandil(from 1830±415 to 1433±428 dyne・s・cm^<-5>;p<0.01). Like nitroglycerin, both doses of nicorandil reduced wave reflection. The reduction in R after 8 mg nicorandil is related to decreased tone in the resistance arteries, probably due to potassium channel opener effects.
- 社団法人日本循環器学会の論文
- 1999-01-20
著者
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Takazawa Kenji
Division Of Cardiology Hachioji Medical Center Tokyo Medical University Department Of Cardiology Tok
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Tanaka Nobuhiro
Division Of Cardiology Department Of Intenal Medicine Tokyo Medical University
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Tkazawa Kenji
Division Of Cardiology Hachioji Medical Center Tokyo Medical University
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Takazawa Kenji
Second Department Of Internal Medicine Tokyo Medical University
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Ibukiyama Chiharu
The second division of internal medicine, Tokyo medical college
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Fujita Masami
The Second Department Of Internal Medicine Tokyo Medical University
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Ibukiyama Chiharu
The Second Department Of Internal Medicine Tokyo Medical University
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Ibukiyama Chiharu
The Second Department Of Internal Medicine Tokyo Medical College
-
Takazawa Kenji
The Second Department of Internal Medicine, Tokyo Medical University
-
Tanaka Nobuhiro
The Second Department of Internal Medicine, Tokyo Medical University
-
Takazawa Kenji
Division Of Cardiology Hachioji Medical Center Tokyo Medical University
-
Ibukiyama Chiharu
The 2nd Department Of Internal Medicine Tokyo Medical College
-
Takazawa Kenji
Cardiology Of Hachioji Medical Center Tokyo Medical University
-
Tanaka Nobuhiro
2nd Department Of Internal Medicine Tokyo Medical University
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Takazawa Kenji
Department Of Internal Medicine Tokyo Medical College Hospital
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Takazawa Kenji
The Second Department Of Internal Medicine Tokyo Medical College
-
Tanaka Nobuhiro
The Second Department Of Internal Medicine Tokyo Medical University
-
Ibukiyama Chiharu
Department Of Internal Medicine Tokyo Medical Colle9e Hospital
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Tanaka Nobuhiko
The Second Department Of Internal Medicine Tokyo Medical University
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Takazawa Kenji
Division Of Cardiology Hachioji Medical Center Tokyo Medical University Department Of Cardiology Tok
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