Which medication is primarily prescribed for the management of arrhythmias?

Atenolol is primarily prescribed for the management of arrhythmias because it is a selective beta-1 adrenergic blocker that helps to regulate heart rate and rhythm. By blocking the effects of adrenaline on the heart, atenolol decreases the heart rate and the force of contraction, which can be particularly beneficial in various types of arrhythmias, such as atrial fibrillation and ventricular tachycardia.

In addition to its use in arrhythmias, atenolol is effective for other cardiovascular conditions, including hypertension and angina. Its ability to stabilize heart rhythm and reduce the workload of the heart makes it a crucial medication in the management of patients with arrhythmic conditions.

The other medications listed serve different primary purposes; for instance, digoxin can also be used in some arrhythmias but is more commonly associated with heart failure and controlling ventricular rates in atrial fibrillation. Warfarin is an anticoagulant used to prevent blood clots rather than directly managing heart rhythms, and insulin is primarily used to manage blood glucose levels in diabetes, not arrhythmias.