What vital sign should be closely monitored after administering adenosine during a supraventricular tachycardia event?

After administering adenosine for the treatment of supraventricular tachycardia (SVT), it is crucial to closely monitor blood pressure. Adenosine works rapidly to reset the heart's electrical conduction system, and this can lead to transient changes in heart rhythms, including a brief period of asystole (no heartbeat) or significant changes in blood pressure related to heart rate normalization.

Monitoring blood pressure is vital as significant hypotension can occur, especially if the patient experiences a rapid return to a normal rhythm from a tachycardic state. By closely observing blood pressure, healthcare providers can identify these changes and respond appropriately, ensuring patient safety and effective management of the SVT event.

The other vital signs, while important in a broader context of patient assessment, do not specifically require the same level of immediate attention following adenosine administration for SVT. For instance, while oxygen saturation and respirations provide valuable information about respiratory status, they are typically less impacted by the effects of adenosine compared to blood pressure. Similarly, temperature is not directly related to the acute management of tachycardia.