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31.
Tropea BI Schwarzacher SP Chang A Asvar C Huie P Sibley RK Zarins CK 《Arteriosclerosis, thrombosis, and vascular biology》2000,20(9):2127-2133
Hypertension is a well-known risk factor for coronary artery disease and carotid and lower extremity occlusive disease. Surgically induced hypertension in hypercholesterolemic animals results in increased aortic wall motion and increased plaque formation. We tested the hypothesis that reduction in aortic wall motion, despite continued hypertension, could reduce plaque formation. New Zealand White rabbits (n=26) underwent thoracic aortic banding to induce hypertension and were fed an atherogenic diet for 3 weeks. In 13 rabbits, a segment of aorta proximal to an aortic band was externally wrapped to reduce wall motion. All animals were fed an atherogenic diet for 3 weeks. Four groups were studied: 1, coarctation control (no wrap, n=7); 2, coarctation with loose wrap (n=6); 3, coarctation with firm wrap (n=7); and 4, control (noncoarcted, n=6). Wall motion, blood pressure, and pulse pressure were measured at standard reference sites proximal and distal to the coarctation by use of intravascular ultrasound. Quantitative morphometry was used to measure intimal plaque. Mean arterial pressure and cyclic aortic wall motion were equally increased proximal to the aortic coarctation in all 3 coarcted rabbit groups compared with the control group (P:<0.001). Wall motion in the segment of aorta under the loose and firm wraps was no different from the control value. The external wrap significantly reduced intimal thickening in the 4 groups by the following amounts: group 1, 0.30+/-0.03 mm(2); group 2, 0.06+/-0.02 mm(2); group 3, 0. 04+/-0.02 mm(2); and group 4, 0.01+/-0.01 mm(2) (P:<0.001). Localized inhibition of aortic wall motion in the lesion-prone hypertensive aorta resulted in significant reduction in intimal plaque formation. These data suggest that arterial wall cyclic motion may stimulate cellular proliferation and lipid uptake in experimental atherosclerosis. 相似文献
32.
Frick M Alber HF Hügel H Schwarzacher SP Pachinger O Weidinger F 《Clinical cardiology》2002,25(6):291-294
BACKGROUND: Flow-mediated vasodilation (FMD) of the brachial artery (BA) has been shown to improve in response to lipid-lowering therapy and other therapeutic interventions, usually within 1 to 2 months. Whether FMD remains improved under therapy in the longer term is unknown. HYPOTHESIS: The aim of this study was to examine the short- and long-term changes of FMD under statin therapy. METHODS: Flow-mediated vasodilation and nitroglycerin-mediated vasodilation (NMD) of the BA were measured with high-resolution ultrasound (13 MHz) at baseline and at 4 and 10 months in 18 consecutively recruited patients with coronary artery disease (CAD), in whom statin therapy was newly established. RESULTS: The decrease of total plasma cholesterol levels after 4 and 10 months of statin therapy (243 +/- 31 vs. 186 +/- 30 vs. 191 +/- 40 mg/dl; p < 0.001) was accompanied by an increase in FMD from 4.4 +/- 3.8% at baseline to 9.6 +/- 2.7% at 4 months and to 9.5 +/- 2.6% at 10 months (p < 0.001). Nitroglycerin-mediated vasodilation showed a trend toward improvement after 4 months (14.6 +/- 7.5 vs. 19.1 +/- 3.6 vs. 19.4 +/- 5.6%; NS). The FMD/NMD ratio also rose significantly after 4 months and remained improved after 10 months of statin therapy (0.31 +/- 0.25 vs. 0.52 +/- 0.16 vs. 0.50 +/- 0.14; p < 0.01). CONCLUSION: Statin therapy is associated with sustained improvement of endothelial function up to 10 months. These data support the utility of FMD for the assessment of vascular function in response to lipid-lowering therapy or other therapeutic interventions in long-term studies. 相似文献
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35.
W. Schwarzacher 《International journal of legal medicine》1935,24(1):387-392
Ohne ZusammenfassungHerrn Prof.F. Reuter in Graz in Verehrung zum 60. Geburtstage gewidmet. 相似文献
36.
W. Schwarzacher 《International journal of legal medicine》1939,31(5):213-222
Ohne Zusammenfassung 相似文献
37.
Ohne ZusammenfassungVorgetragen auf der XV. Tagung der deutschen Gesellschaft für gerichtliche und soziale Medizin in Düsseldorf, September 1926. 相似文献
38.
Prof. Dr. W. Schwarzacher 《International journal of legal medicine》1928,12(1):513-514
Ohne Zusammenfassung 相似文献
39.
Prof. Dr. Schwarzacher 《International journal of legal medicine》1930,15(1):119-124
Ohne ZusammenfassungVorgetragen auf der 18. Tagung der Deutschen Gesellschaft für Gerichtliche und Soziale Medizin in Heidelberg, September 1929. 相似文献