Endothelium-derived NO, but not cyclic GMP, is required for hypoxic augmentation in isolated porcine coronary arteries
The present study investigated the mechanism underlying the transient potentiation of vasoconstriction by hypoxia in isolated porcine coronary arteries. Isometric tension was measured in rings with or without endothelium. Hypoxia (Po2 lt;30 mmHg) caused a transient further increase in tension (hypoxic augmentation) in contracted (with U46619) preparations. The hypoxic response was endothelium dependent and abolished by inhibitors of nitric oxide synthase [N-nitro-l-arginine methyl ester (l-NAME)] or soluble guanylyl cyclase (ODQ and NS2028). The addition of DETA NONOate (nitric oxide donor) in the presence of l-NAME restored the hypoxic augmentation, suggesting the involvement of the nitric oxide pathway. However, the same was not observed after incubation with 8-bromo-cyclic GMP, atrial ...div id=medwormpbiMedWorm Message:/i/b Please support the a href=http://www.doctorsinchains.org/ target=_blankDoctors In Chains/a campaign for the a href=http://www.doctorsinchains.org/medics/a tortured and sentenced for up to 15 years in a href=http://www.doctorsinchains.org/Bahrain/a. a href=https://twitter.com/#!/search/%23FreeDoctors#FreeDoctors/a/p/div
In Heart Failure Treatment, Warfarin And Aspirin Are Similar
In the largest and longest head-to-head comparison of two anti-clotting medications, warfarin and aspirin were similar in preventing deaths and strokes in heart failure patients with normal heart rhythm, according to late-breaking research presented at the American Stroke Association's International Stroke Conference 2012. Although there was a warfarin benefit for patients treated for four or more years, overall, warfarin and aspirin were similar, said Shunichi Homma, M.D., lead author of the study and the Margaret Milliken Hatch Professor of Medicine at Columbia University in New York... (Source: Health News from Medical News Today)
