A nurse recognizes that alterations in cardiac output are caused by changes in heart rate, preload, afterload, and contractility. Which interventions are correctly matched to treat the cause of low cardiac output? Select all that apply.
a) Low afterload: administer vasopressor.
b) Low afterload: administer vasodilator.
c) Low right atrial (R

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.

Choice A reason: Increasing the rate of IV fluid administration is not the priority action in this situation. Although maintaining adequate fluid levels is important for patients with traumatic brain injuries, the symptoms described (pulse change, increased pulse pressure, and respiratory irregularities) indicate that the patient may be experiencing increased intracranial pressure (ICP). Fluid administration alone will not address this issue and could potentially worsen the condition if not managed carefully.

Choice B reason: The priority action is to notify the provider immediately. The changes in vital signs (decreased pulse, increased pulse pressure, and respiratory irregularities) suggest that the patient may be experiencing increased intracranial pressure (ICP), which is a medical emergency. Immediate notification of the provider is essential for timely intervention to prevent further neurological damage or complications.

Choice C reason: Preparing to give IV pain medication is not the priority in this situation. While managing pain is important, the patient's vital sign changes indicate a more serious underlying issue (potential increased intracranial pressure) that requires immediate medical attention. Pain medication alone will not address the root cause of the symptoms.

Choice D reason: Notifying respiratory therapy for a breathing treatment is not the priority action in this scenario. Although respiratory irregularities are present, the vital sign changes suggest that the patient is experiencing increased intracranial pressure. This requires immediate medical intervention by the provider to manage the underlying condition, rather than solely focusing on respiratory support.