Registered Cardiovascular Invasive Specialist (RCIS) Practice Test

What is a common use for adenosine in cardiac treatment?

1. Managing hypotension

2. Suppressing atrial fibrillation

3. Converting paroxysmal SVT

4. Inducing ventricular tachycardia

The correct answer is: Converting paroxysmal SVT

Adenosine is commonly used in cardiac treatment for converting paroxysmal supraventricular tachycardia (SVT). Its primary mechanism of action involves temporarily blocking the conduction through the atrioventricular (AV) node, which can interrupt reentrant pathways that cause SVT. When administered intravenously, adenosine can effectively restore normal sinus rhythm in patients experiencing this type of rapid heart rate. This swift action makes it a critical drug in emergency situations related to paroxysmal SVT, as it provides a rapid and safe means to stabilize the patient's heart rhythm. In contrast, adenosine is not typically used for managing hypotension, as its primary role is not related to blood pressure management. It also isn't designed to suppress atrial fibrillation directly, as this condition may require different therapeutic approaches. Additionally, adenosine would not be used to induce ventricular tachycardia, which is an arrhythmia that can be life-threatening and requires careful management rather than induction. Thus, the use of adenosine stands out prominently for its effectiveness in converting paroxysmal SVT.