نتایج جستجو برای: inotropic effect

تعداد نتایج: 1644963  

2005
Andrew S. Weyrich Xin-liang Ma Michael Buerke Toyoaki Murohara Valerie E. Armstead Allan M. Lefer Josep M. Nicolas Andrew P. Thomas David J. Lefer Jakob Vinten-Johansen

We examined the effect of several nitric oxide (NO) donors, authentic NO gas, and L-arginine in isolated cat and rat papillary muscles. We did not observe significant inotropic effects in response to any NO donor (ie, SPM-5185, C87-3754, and S-nitroso-N-acetylpenicillamine [SNAP]) from 1 nmol/L to 100 ,umol/L. Similarly, authentic NO, at concentrations far in excess of those that maximally dila...

Journal: :Circulation 1992
W von Scheidt M Böhm B Schneider B Reichart E Erdmann G Autenrieth

BACKGROUND The regulation of contractility of the transplanted heart depends on circulating catecholamines resulting from cardiac denervation. Supersensitivity to circulating catecholamines may result from loss of presynaptic neuronal uptake or upregulation of postsynaptic beta-adrenergic receptors. METHODS AND RESULTS Dose-response curves using the beta-adrenergic receptor agonists isoprenal...

Journal: :General physiology and biophysics 1993
D Zacharová E Lipská M Hencek J Hochmannová V Sajter

The effect of catecholamines on basic membrane characteristics (including labeled ionic fluxes) and contractile parameters was followed in current clamp and voltage clamp conditions in intact muscle fibres and internally perfused muscle fibre segments respectively of the crayfish Astacus fluviatilis; i.e. in muscle fibres which spike and activate tension on calcium principle. Both adrenaline an...

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