Hemodynamic sequelae of regression of experimental atherosclerosis.
Hemodynamic sequelae of regression of experimental atherosclerosis.
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实验性动脉粥样硬化消退的血流动力学后遗症。
DOI:
10.1172/jci110738
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发表时间:
1983
期刊:
影响因子:
--
通讯作者:
Abboud,FM
中科院分区:
文献类型:
--
作者:
Armstrong,ML;Heistad,DD;Marcus,ML;Piegors,DJ;Abboud,FM
Regression of experimental atherosclerosis is characterized by decreased intimal thickness and luminal enlargement, but intimal fibrosis becomes more dense. We tested the hypothesis that fibrosis of arteries during regression might limit vasodilator capacity and restrict hemodynamic improvement despite luminal improvement. We studied limb, coronary, and cerebral hemodynamics in 11 normal cynomolgus monkeys, 10 monkeys given an atherogenic diet for 20 mo and 8 monkeys given a regression diet for an additional 18 mo. The atherogenic diet induced lesions of moderate severity (50-60% stenosis); owing to characteristic vessel growth during the atherogenic period, luminal size did not decrease correspondingly. Regression monkeys showed typical changes of regression with luminal enlargement but increased fibrosis. The iliac artery was perfused at constant blood flow and maximal vasodilatation was produced with papaverine. Blood flow was measured with microspheres during maximal vasodilatation in the coronary bed (adenosine) and cerebral bed (hypercapnia). In normal monkeys, minimal vascular resistances were 1.95 +/- 0.19 mm Hg/ml/min X 100 g (mean +/- SE) (limb), 0.13 +/- 0.01 (coronary), and 0.44 +/- 0.02 (cerebral). In atherosclerotic monkeys minimal resistance increased (P less than 0.05) 108, 62, and 166% in the limb, coronary, and cerebral beds, respectively. In regression monkeys, minimal resistance increased from values found in atherosclerotic animals in the limb (+22%), decreased inconsistently in the coronary bed (-19%), and decreased significantly in the cerebral bed (-44%, P less than 0.05). Thus morphologic regression was accompanied by significant hemodynamic improvement during maximal dilatation only in cerebral vessels. We conclude that increases in luminal size during regression of atherosclerotic lesions may not be associated with increases in vasodilator capacity, as intimal fibrosis may limit physiologically important hemodynamic improvement.
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DOI:
10.1172/jci106300
发表时间:
1970
期刊:
The Journal of clinical investigation
影响因子:
--
作者:
R. Zelis;D. Mason;E. Braunwald;R. Levy
通讯作者:
R. Levy
DOI:
--
发表时间:
1980
期刊:
The American journal of pathology
影响因子:
--
作者:
Bond,MG;Bullock,BC;Bellinger,DA;Hamm,TE
通讯作者:
Hamm,TE
影响因子:
6
作者:
C. Tucker;C. Catsulis;J. Strong;D. Eggen
通讯作者:
D. Eggen
影响因子:
3.6
作者:
W. Wagner;R. Clair;T. Clarkson
通讯作者:
T. Clarkson
影响因子:
20.1
作者:
F. Abboud;J. W. Eckstein
通讯作者:
J. W. Eckstein