In managing stable hemodynamic status after CABG, which statement is NOT true?

The statement that a vasopressor optimizes cardiac output is not true in the context of managing a stable hemodynamic status after coronary artery bypass grafting (CABG). While vasopressors are used to increase systemic vascular resistance and blood pressure in patients experiencing hypotension or shock, their primary function is not to optimize cardiac output directly. In fact, excessive use of vasopressors can lead to increased afterload, which may actually hinder cardiac output, especially in patients with compromised heart function.

In contrast, vasodilators can indeed improve cardiac output by reducing afterload and helping the heart pump more effectively. This can be particularly important in the postoperative setting, where the heart may be under stress due to the surgical procedure.

Extra fluid needs during rewarming is an important consideration, as fluid shifts and changes in blood volume can occur, requiring careful management to avoid complications such as fluid overload or hypovolemia. Epicardial pacing wires can help maintain an adequate heart rate in the immediate postoperative period, ensuring that the heart fills and contracts effectively.

Understanding these nuances is crucial for effective management of patients following CABG, particularly in maintaining hemodynamic stability without inadvertently compromising cardiac function.