What is the typical hemodynamic target for mean arterial pressure (MAP) in the immediate postoperative CABG period?

• A. 40-50 mmHg
• B. 65-85 mmHg
• C. 100-120 mmHg
• D. MAP is not important

Answer: (B)

In the immediate postoperative CABG period, maintaining adequate perfusion pressure is essential to support the recovering heart and the grafts. The goal is to provide enough mean arterial pressure to ensure proper coronary perfusion without pushing the heart to work too hard or increasing bleeding risk. A typical target is about 65–85 mmHg. This range helps maintain enough coronary perfusion pressure to drive blood through the grafts and myocardium, while avoiding the problems that come with hypotension (ischemia) or hypertension (increased afterload and bleeding risk). If MAP falls toward the lower end, coronary and organ perfusion can falter; if it rises too high, the heart struggles with higher afterload and bleeding risk. In some patients with very high LV filling pressures, clinicians may adjust targets within this general range, but 65–85 mmHg is the commonly accepted guideline.