Search results
Results from the WOW.Com Content Network
Dobutamine is administered as a racemic mixture consisting of both (+) and (−) isomers; the (+) isomer is a potent β 1 agonist and α 1 antagonist, while the (−) isomer is an α 1 agonist. [9] The administration of the racemate results in the overall β 1 agonism responsible for its activity.
Stress and potential cardiac damage from exercise during the test is a problem in patients with ECG abnormalities at rest or in patients with severe motor disability. Pharmacological stimulation from vasodilators such as dipyridamole or adenosine, or positive chronotropic agents such as dobutamine can be used.
Some substances do both (e.g. dopamine, dobutamine). If low blood pressure is due to blood loss, then preparations increasing volume of blood circulation—plasma-substituting solutions such as colloid and crystalloid solutions (salt solutions) [1] —will raise the blood pressure without any direct vasopressor activity.
Specifically, dobutamine selectively binds to β1 receptors located on the surface of specialised cardiac muscle cells. [16] Relative to β2 receptors, β1 is the predominant type in terms of quantity and function within the heart.
Most agonists of the beta receptors are selective for one or more beta-adrenoreceptors. For example, patients with low heart rate are given beta agonist treatments that are more "cardio-selective" such as dobutamine, which increases the force of contraction of the heart muscle.
4 Ways To Keep Your Greens Fresh for Longer. Too much moisture is what causes leafy greens to turn soft and rot.Here are four ways to keep moisture at a minimum:
Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or phone number.
β 1-Adrenergic receptor agonists, also known as beta-1 agonists, are a class of drugs that bind selectively to the β 1-adrenergic receptor.As a result, they act more selectively upon the heart. β-Adrenoceptors typically bind to norepinephrine release by sympathetic adrenergic nerves and to circulating epinephrine.