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Adenosine (symbol A) is an organic compound that occurs widely in nature in the form of diverse derivatives. The molecule consists of an adenine attached to a ribose ...
Termination of PSVT following adenosine administration. Adenosine, an ultra-short-acting AV nodal blocking agent, is indicated if vagal maneuvers are not effective. [17] If unsuccessful or the PSVT recurs, calcium channel blockers, such as diltiazem or verapamil, are recommended. [4] Adenosine may be safely used during pregnancy. [18]
Adenosine triphosphate (ATP) is a nucleoside triphosphate [2] that provides energy to drive and support many processes in living cells, such as muscle contraction, nerve impulse propagation, and chemical synthesis. Found in all known forms of life, it is often referred to as the "molecular unit of currency" for intracellular energy transfer. [3]
Caffeine keeps you awake by blocking adenosine receptors. Each type of adenosine receptor has different functions, although with some overlap. [3] For instance, both A 1 receptors and A 2A play roles in the heart, regulating myocardial oxygen consumption and coronary blood flow, while the A 2A receptor also has broader anti-inflammatory effects throughout the body. [4]
If the patient is stable, adenosine may be used for restoration of sinus rhythm in patients with macro-reentrant supraventricular tachycardias. It causes a short-lived cessation of conduction through the atrio-ventricular node breaking the circus movement through the node and the macro-reentrant pathway restoring sinus rhythm.
A mediating agent is released or generated as a function of changes in luminal NaCl concentration. The size of the TGF response is directly dependent upon these changes. "In part because of the striking effect of deletion of A1 adenosine receptors (A1AR), adenosine generated from released ATP has been proposed as the critical TGF mediator. [6]
adenosine, calcium channel antagonists, beta blockers, flecainide AV-nodal reentrant tachycardia ( AVNRT ) is a type of abnormal fast heart rhythm . It is a type of supraventricular tachycardia (SVT), meaning that it originates from a location within the heart above the bundle of His .
Supraventricular tachycardia (SVT) is an umbrella term for fast heart rhythms arising from the upper part of the heart. [2] This is in contrast to the other group of fast heart rhythms – ventricular tachycardia, which start within the lower chambers of the heart. [2]