The nurse is caring for a patient with chest pain, concerning for acute myocardial infarction.
Which of the following interventions should be prioritized?

Choice A rationale

Decreased cardiac output (CO) post-CABG is often due to hypovolemia resulting from third-spacing, blood loss, or insufficient fluid replacement, especially given the open heart procedure's significant fluid shifts. Administering a rapid IV fluid bolus is the initial priority to promptly increase preload and thus stroke volume and cardiac output, assuming no contraindications like signs of pulmonary edema.

Choice B rationale

Increasing the oxygen flow rate addresses potential hypoxemia, but it does not correct the underlying issue of low cardiac output and impaired systemic perfusion. While oxygenation is vital, fluid resuscitation directly targets the most likely hemodynamic cause of decreased CO post-surgery.

Choice C rationale

Assessing for bleeding (e.g., chest tube output) is a necessary step to identify and correct a source of ongoing hypovolemia. However, administering a fluid challenge is the immediate, life-sustaining intervention to temporize the falling CO while the assessment and notification process proceeds.

Choice D rationale

Notifying the physician is necessary after performing initial life-saving interventions and gathering supporting data. The nurse must first implement the standing protocol intervention for low cardiac output, which is often a fluid bolus, as delaying treatment for low CO can lead to critical organ hypoperfusion. —.

Choice A rationale

Syncope, or transient loss of consciousness, in a patient with a pacemaker is often a sign of inadequate cardiac output, potentially due to a sudden drop in heart rate. This can happen if the pacemaker is malfunctioning or if the battery voltage has dropped below a critical level, indicating a need for urgent assessment and possible device replacement.

Choice B rationale

While infection is a risk and can cause systemic symptoms like fever and malaise, it is less likely to be the immediate and primary cause of acute syncope. Syncope suggests a hemodynamic issue, making direct assessment of the device's function and battery life a more critical initial step compared to checking for localized infection signs.

Choice C rationale

Recent dietary changes are generally not a direct, immediate cause of acute syncope unless they lead to severe electrolyte imbalances or hypoglycemia. Although nutrition is important for overall health, a pacemaker patient's acute syncope requires an initial focus on cardiac function and device performance over lifestyle changes.

Choice D rationale

A patient's medication history can certainly contribute to syncope (e.g., hypotension from antihypertensives). However, in a patient with a pacemaker, the most likely cause of an acute syncopal episode is device malfunction or battery depletion, making the assessment of the pacemaker's electrical integrity the highest priority. —. ##.