300
Beta-blocker use perioperatively is determined by risk.
A high risk patient has more than one clinical risk factor and should continue/start beta-blockers titrated to heart rate and blood pressure for high risk surgery (vascular surgery) and intermediate risk surgery (prostate, orthopedic, head, neck, chest, carotid, intraperitoneal).
There is no recommendation for starting a beta-blocker for low risk surgeries (ambulatory, superficial, endoscopic, cataract, breast surgery).
The clinical risk factors are:
What are history of ischemic heart disease, heart failure, cerebrovascular disease, diabetes, serum creatinine 2mg dl or higher?