Verapamil and adenosine are typically used for which type of tachycardia?

Verapamil and adenosine are effective treatments specifically for narrow QRS complex tachycardias. These medications work by acting on the conduction system of the heart, particularly the atrioventricular (AV) node, which plays a crucial role in controlling the electrical signals that regulate heart rhythm.

In scenarios such as paroxysmal supraventricular tachycardia (SVT) or atrial flutter, both medications can help restore a normal rhythm by slowing down conduction through the AV node. Adenosine, in particular, is known for its rapid action, offering a very quick way to terminate tachycardia episodes. Verapamil, as a calcium channel blocker, gradually slows heart rate and can also help manage symptoms associated with narrow complex tachycardias like atrial fibrillation with a rapid ventricular response.

Understanding the distinction between wide and narrow QRS complex tachycardias is essential in critical care. Wide QRS complex tachycardias suggest prolonged conduction and may indicate ventricular origins, where verapamil and adenosine would not be appropriate. Therefore, in cases of narrow QRS complex tachycardias, verapamil and adenosine are the preferred treatments due to their targeted effects on