The nurse is caring for a client in the telemetry unit and notices the rhythm below. The client is unresponsive and pulseless. After calling for assistance, what should be the nurse's next action?

A. Dopamine and 50% non-rebreather mask: Dopamine is a vasopressor used in hypotension or shock, an inotropic agent used to improve cardiac output, not typically first-line for anxiety or respiratory distress. A non-rebreather mask may provide high oxygen levels but can be overwhelming and exacerbate anxiety if not well tolerated.

B. Nesiritide IV infusion and digoxin PO: Nesiritide is a vasodilator which may reduce preload and afterload in heart failure, and digoxin is a positive inotrope that can improve contractility, but neither offers rapid relief for anxiety and dyspnea. These medications have slower onset and are not used primarily for symptom control in acute distress.

C. Diazepam IV push and metoprolol IV: While diazepam may reduce anxiety, it can depress respiration, which is dangerous in decompensated heart failure with potential pulmonary edema. Metoprolol reduces heart rate and contractility and must be used cautiously in acute settings.

D. Morphine IV and oxygen 2 liters via nasal cannula: Morphine reduces preload, anxiety, and the sensation of breathlessness, making it ideal in acute decompensated heart failure. Low-flow oxygen improves oxygenation without overwhelming the patient. This combination directly targets both physiologic and psychological distress.

A. Diaphoresis, hypertension: While diaphoresis may occur in response to the discomfort or anxiety caused by a rapid heart rate, hypertension is not a typical feature of atrial flutter. The rapid ventricular response can more often lead to hypotension if cardiac output is compromised.

B. Palpitations, shortness of breath: These are hallmark symptoms of rapid atrial flutter. Palpitations result from the fast, irregular atrial contractions, while shortness of breath may occur due to decreased cardiac output and poor ventricular filling during rapid rates.

C. Systolic murmur, severe anxiety: Atrial flutter is not typically associated with a systolic murmur unless there is a pre-existing valvular condition. Anxiety may be present but is a nonspecific response and not as directly linked to atrial flutter as palpitations and dyspnea.

D. Visual changes, anorexia: These symptoms are not characteristic of atrial flutter. Visual changes may occur with severe hypotension or embolic events, and anorexia may be seen in chronic illness, but neither is directly tied to the acute presentation of atrial flutter.