Final answer:
The nurse should assess the cause of postoperative sinus tachycardia in a client with coronary artery bypass surgery and manage it accordingly, which may include pain control, fluid management, and monitoring for complications. Advanced interventions involve cardiology consultation and possibly an artificial pacemaker.
Step-by-step explanation:
The client exhibiting sinus tachycardia one day postoperative from coronary artery bypass surgery needs careful assessment and management. In this acute phase, the priority is to identify the cause of tachycardia which could range from pain, hypovolemia, to heart failure or myocardial infarction. While interventions may include optimizing pain control, ensuring adequate fluid balance, and monitoring for any signs of complications, in scenarios where tachycardia persists or the patient's condition worsens, advanced interventions such as medication management or use of an artificial pacemaker may be considered under the guidance of a cardiologist. Additionally, post-surgery care emphasizes long-term behavior changes including diet and exercise, along with medication to manage blood pressure, cholesterol, and reduce clotting, all critical in preventing further cardiac issues.