A patient develops increasing dyspnea and hypoxemia 2 days after heart surgery. What procedure should the nurse anticipate assisting with to determine whether the patient has acute respiratory distress syndrome (ARDS) or pulmonary edema caused by heart failure?

A In atrial fibrillation (AF), the electrical activity in the atria is chaotic, leading to an irregularly irregular ventricular response. As a result, the pulse felt at the radial artery will be irregular, with no discernible pattern. The irregularity is a hallmark feature of AF and is often described as "irregularly irregular."

B Bounding pulses are characterized by a strong and forceful pulsation felt at the arterial pulse sites. In atrial fibrillation, the irregular and rapid ventricular response can lead to an increased stroke volume and forceful contraction of the left ventricle during diastole, resulting in bounding pulses. However, bounding pulses are not typically associated with atrial fibrillation; they are more commonly seen in conditions such as aortic regurgitation or hyperdynamic circulation.

C In some cases of atrial fibrillation, especially if the ventricular rate is very rapid or irregularly irregular, the pulse may not be palpable due to the inconsistent ventricular contractions.

However, in most cases of atrial fibrillation, a pulse is palpable, albeit irregular.

D Atrial fibrillation can result in a rapid ventricular response, leading to a fast heart rate. However, the pulse rate can vary widely among individuals with atrial fibrillation. While some may have a rapid heart rate (tachycardia), others may have a slower heart rate (bradycardia), depending on factors such as concomitant medications, autonomic tone, and the presence of underlying heart disease.

D Normal saline bolus administration is indicated for hypovolemia or inadequate intravascular volume, which can lead to decreased cardiac output and hypotension. In this scenario, the client has an amber urine output of 45ml in the last 3 hours, indicating decreased urine output and potential hypovolemia. The elevated blood pressure (170/67 mmHg) suggests possible volume overload or fluid retention, but the decreased urine output raises concerns for inadequate intravascular volume. Therefore, administering a normal saline bolus may be the first priority to optimize intravascular volume and improve cardiac output.

A Isosorbide mononitrate is a vasodilator commonly used in the treatment of heart failure and angina. It helps reduce preload and afterload, thereby decreasing the workload on the heart. However, in this scenario, the client's blood pressure is elevated (170/67 mmHg), and there is no indication of acute decompensation or pulmonary congestion. Therefore, isosorbide PO may not be the first priority medication at this time.

B Nitroglycerin is a potent vasodilator commonly used to manage acute heart failure exacerbations and acute coronary syndromes. It helps reduce preload and afterload, improving cardiac output and relieving symptoms of heart failure. In this scenario, the client's blood pressure is elevated, but the heart rate is normal, and there are no signs of acute decompensation. Therefore, initiating a nitroglycerin drip may not be the first priority unless the client develops symptoms of acute decompensation or pulmonary congestion.

C Dopamine is a vasopressor medication that can be used to increase blood pressure and cardiac output in patients with hypotension or shock. However, in this scenario, the client's blood pressure is elevated (170/67 mmHg), and there is no evidence of hypotension. Therefore, initiating a dopamine drip may not be appropriate at this time and could potentially exacerbate hypertension.