See Also: nuclear bag fibre(medicine)
nuclear chain fibre(medicine)
Nuclear medicine(medicine)
nuclear medicine(encyclopedia)
Nuclear Medicine(health)
nuclear medicine physician(medicine)
Nuclear medicine scan(health)
Kiran Hospital for Nuclear Medicine(health)
nuclear medicine department, hospital(medicine)
Nuclear medicine imaging techniques(health)

9-beta-d-ribofuranosyladenine (medicine) and nuclear bag fibre (medicine)


9-beta-d-ribofuranosyladenine (medicine)


9-beta-d-ribofuranosyladenine -->
adenosine
<biochemistry> A ribonucleotide which consists of the nitrogenous base adenine linked to the sugar ribose.

<drug> A cardiac drug used in terminating PSVT involving reentry pathways that include the AV node or Wolff-Parkinson-White syndrome. For atrial flutter, atrial fibrillation, atrial or ventricular tachycardias, adenosine may produce transient AV block that may help identify the rhythm.

Pharmacologic action: Endogenous purine nucleoside that depresses AV node and sinus node activity. Brief duration of action (1-2 min).

Dose: Rapid 6 mg IV bolus over 1-3 sec. May repeat at 12 mg IV bolus within 1-2 min Patients taking theophylline may require larger doses. Use a smaller dose with cardiac transplant patients.

Potential complications: Common but transient - flushing, dyspnea, chest pain, bradycardia, and ventricular ectopy. Theophylline (and caffeine) blocks adenosine's effects. Dipyridamole potentiates adenosine's effects. Use Other agents to avoid these drug interactions.


nuclear bag fibre (medicine)


nuclear bag fibre


The largest type of intrafusal muscle fibre's in a neuromuscular spindle, containing a central aggregation of nuclei (nuclear bag).