Final answer:
Stopping ß-blockers perioperatively without proper management increases the body's sensitivity to catecholamines, leading to a potential rise in heart rate and blood pressure, which can be dangerous.
Step-by-step explanation:
The question is related to the perioperative management of patients on ß-blockers, a class of medications commonly used to treat high blood pressure and other heart conditions. When these medications are stopped abruptly, patients may experience an increased sensitivity to catecholamines such as adrenaline (also known as epinephrine) and noradrenaline (also known as norepinephrine). This can lead to potential complications, including an increase in heart rate and blood pressure. ß-blockers work by blocking the effects of adrenaline on the heart, which reduces heart rate and blood pressure. Therefore, stopping ß-blockers before surgery without proper management can be dangerous as it can lead to an imbalance in the body's response to stress and potentially exacerbate cardiac issues.