Large and Small Coronary Arteries in Conscious Dogs
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چکیده
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منابع مشابه
Differential effects of nitrovasodilators, K(+)-channel openers, and nicorandil on large and small coronary arteries in conscious dogs.
When administered intravenously to conscious dogs, nicorandil, nitrovasodilators (nitroglycerin and SIN-1), and the K(+)-channel opener cromakalim exhibited marked differential effects on large epicardial and small resistance coronary arteries. Nitrovasodilators markedly increased the left circumflex coronary artery diameter at doses at which coronary resistance was not significantly decreased....
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Coronary vascular responses to acetylcholine (ACh, 3 μg/kg iv), nitroglycerin (NTG, 25 μg/kg iv), and a 20-s coronary artery occlusion (reactive hyperemia, RH) were investigated in seven conscious dogs with severe left ventricular (LV) hypertrophy and chronic coronary pressure overload (CCPO) due to supravalvular aortic banding and in seven control dogs. All dogs were instrumented for measureme...
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The effects of nitroglycerin (NTG) and nitroprusside (NPR) were examined in conscious dogs on measurements of left circumflex coronary blood flow and coronary diameter and on calculations of late diastolic coronary resistance (LDCR) and left circumflex coronary internal cross-sectional area (CSA). The effects of infusions of NTG, 8 microgram/kg/Min for 7 minutes, and NPR, 2.5 microgram/kg/min f...
متن کاملPHIARMACOLOGY Dipyridamole dilates large coronary arteries in conscious dogs
The effects of 0.25 mg/kg dipyridamole on left ventricular (LV) pressures, LV dP/dt, heart rate, aortic pressures, left circumflex coronary blood flow, and left circumflex coronary arterial diameters and on calculations of late diastolic coronary resistance and large coronary cross-sectional area were studied in 15 conscious dogs. Injection of dipyridamole, a drug that has a mechanism of action...
متن کاملEndothelin-dependent effects limit flow-induced dilation of conductance coronary vessels after blockade of nitric oxide formation in conscious dogs.
OBJECTIVE To determine whether endothelin (ET)-dependent effects limit shear stress-induced dilation of large epicardial coronary arteries after blockade of nitric oxide (NO) formation. METHODS In conscious dogs instrumented for measuring coronary blood flow (CBF) and external diameter (CD) of the circumflex coronary artery, flow-dependent CD dilation was elicited by intracoronary (i.c.) aden...
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تاریخ انتشار 2005