A nurse administers prescribed adenosine to a symptomatic patient in supraventricular tachycardia (SVT). Which response would the nurse assess for as an expected therapeutic response?

Choice A reason: An increased heart rate is not an expected therapeutic response to adenosine. Adenosine is used to slow the heart rate by temporarily blocking the electrical conduction through the atrioventricular (AV) node. This action is crucial in managing supraventricular tachycardia (SVT), as it can help restore a normal heart rhythm. An increased heart rate would suggest that the medication is not working as intended, and the underlying tachycardia may persist or worsen.Choice B reason: A short period of asystole is the correct and expected therapeutic response when administering adenosine. Adenosine works by briefly stopping the heart's electrical activity, leading to a brief asystole (lack of heartbeat). This allows the heart's natural pacemaker to reset and potentially restore a normal rhythm. Although this can be alarming, it is a known and anticipated effect of the drug, and it typically resolves quickly as the heart resumes normal activity.Choice C reason: Hypertension is not an expected response to adenosine. Adenosine generally causes vasodilation, which can lower blood pressure. The primary focus of adenosine in the context of SVT is on its cardiac effects rather than influencing blood pressure significantly. If hypertension occurs, it may be unrelated to the administration of adenosine and could indicate another underlying issue that needs to be addressed.Choice D reason: Decreased intraocular pressure is not a relevant or expected response to adenosine administration in the context of managing SVT. Adenosine's primary effect is on the heart's electrical conduction system, and it does not significantly impact intraocular pressure. The focus should remain on observing the cardiac responses to ensure the medication is effectively managing the SVT.