Search results
Results from the WOW.Com Content Network
For symptomatic bradycardia, the usual dosage is 0.5 to 1 mg IV push; this may be repeated every 3 to 5 minutes, up to a total dose of 3 mg (maximum 0.04 mg/kg). [23] Atropine is also useful in treating second-degree heart block Mobitz type 1 (Wenckebach block), and also third-degree heart block with a high Purkinje or AV-nodal escape rhythm.
The use of atropine, lidocaine, and amiodarone have not been shown to improve survival from cardiac arrest. [116] [117] [81] Atropine is used for symptomatic bradycardia. It is given at a does of 1 mg (iv), and additional 1 mg (iv) doses can be given every 3–5 minutes for a total of 3 mg.
Acetylcholine hyperpolarizes the sinoatrial node; this is overcome by MRAs, and thus they increase the heart rate. If atropine is given by intramuscular or subcutaneous injection, it causes initial bradycardia. This is because when administered intramuscularly or subcutaneously atropine acts on presynaptic M1 receptors (autoreceptors).
In the 1850s, atropine was used as antispasmodic in asthma treatment and as morphine antidote for its mydriatic effect. [4] Bezold and Bloebaum showed that atropine blocked the effects of vagal stimulation on the heart in 1867. Subsequently in 1872, Heidenhain found its ability to prevent salivary secretion. [6]
Organophosphate based nerve agent poisoning, such as VX, sarin, tabun, and soman (atropine is favoured in conjunction with an oxime, usually pralidoxime) [6] [7] Anticholinergics generally have antisialagogue effects (decreasing saliva production), and most produce some level of sedation, both being advantageous in surgical procedures.
Intravenous calcium gluconate (or calcium chloride if a central line is available) and atropine are first-line therapies. If the time of the overdose is known and presentation is within two hours of ingestion , activated charcoal , gastric lavage , and polyethylene glycol may be used to decontaminate the gut.
Diphenoxylate/atropine, also known as co-phenotrope and sold under the brand name Lomotil among others, is used to treat diarrhea. [2] [3] It is a fixed-dose combination of the medications diphenoxylate, as the hydrochloride, an antidiarrheal; and atropine, as the sulfate, an anticholinergic. [1] It is taken by mouth. [2] Onset is typically ...
The reflex can be blocked by intravenous injection of an anti-muscarinic acetylcholine (ACh) antagonist, such as atropine or glycopyrrolate. If bradycardia does occur, removal of the stimulus is immediately indicated. This often results in the restoration of normal sinus rhythm of the heart.