Successful implementation of perioperative beta-blockade utilizing a multidisciplinary approach

Abstract

Purpose: To describe how we implemented a protocol for perioperative beta-blockade in patients with or at risk of coronary artery disease (CAD) undergoing major non-cardiac surgery and to present our results. Methods: After institutional approval, from May 1999 to April 2001, patients with surgical and medical indications (CAD as indicated by previous myocardial infarction, typical angina or atypical angina with a positive stress test or at least two risk factors for CAD: age 65 yr, hypertension, smoking, high cholesterol, diabetes mellitus) for perioperative beta-blockade were identified preoperatively by anesthesiology and referred to the General Internal Medicine Service (MED). MED initiated patients on outpatient beta-blockers. The intraoperative anesthetic management was left to the discretion of the anesthesiologist. In the postanesthesia care unit (PACU), patients received iv metoprolol according to hemodynamic criteria. Postoperatively, patients were followed by MED for adverse cardiac events. Results: Sixty-nine patients received perioperative beta-blockade. Preoperatively, 60% were started on metoprolol, 39% on atenolol and 1% on propranolol. In PACU, 42%, 9% and 38% of patients were given iv metoprolol 0, 5 and 10 mg respectively. One patient was given glycopyrrolate in the PACU for bradycardia and none received vasoactive or inotropic agents. Three patients (4.3%) had postoperative cardiac events. Conclusions: With close collaboration between anesthesiologists, internists, PACU nurses and family physicians, a strategy for perioperative beta-blockade was implemented successfully in patients with cardiac risks. Beta-blockade was associated with few side effects and morbidities.