What is one antiarrhythmic use of atropine?

Atropine is commonly used to treat bradycardia, which is characterized by an abnormally slow heart rate. When bradycardia occurs, it can lead to insufficient blood flow and oxygen supply to vital organs. Atropine works by blocking the action of acetylcholine on the muscarinic receptors in the heart, resulting in increased heart rate. This is particularly important in emergency situations where rapid heart rate restoration is crucial for patient stability.

Although atropine has various impacts on heart rhythm and function, its primary and well-established use as an antiarrhythmic agent is to counteract bradycardia. Other conditions like atrial fibrillation or heart block may require different therapeutic approaches and medications that specifically target those arrhythmias or their underlying mechanisms, rather than relying on atropine’s effects on heart rate.