Preoperative Risk Assessment for Bradycardia in General Surgery

Essential Preoperative Evaluation Components

• The American Society of Anesthesiologists recommends a focused preoperative evaluation to determine if the patient has a cardiac rhythm management device (CRMD), assess pacemaker dependency, and stratify risk using patient-specific factors for patients with bradycardia undergoing general surgery 1
• The preoperative assessment must establish four critical elements: device presence, device type identification, pacemaker dependency determination, and device function verification for patients with bradycardia undergoing general surgery 1

Risk Stratification

• The American College of Cardiology recommends applying the validated 5-point HEART score to predict intraoperative bradycardia or hypotension risk for patients with bradycardia undergoing general surgery 2
• Each point in the HEART score increases the odds of intraoperative bradycardia/hypotension by 2.51-fold, with maximum scores yielding a likelihood ratio of 3.64 for patients with bradycardia undergoing general surgery 2

Preoperative Management Algorithm for High-Risk Patients

• The American College of Cardiology recommends placing transcutaneous pacing pads before surgery begins for high-risk patients with elevated HEART scores or known conduction disease 2
• The American College of Cardiology recommends ensuring atropine availability at the surgical field for high-risk patients with elevated HEART scores or known conduction disease 2

Critical Pitfall: Avoid Routine Prophylactic Transvenous Pacing

• The American College of Cardiology recommends against routine prophylactic transvenous pacing, even in patients with left bundle branch block requiring pulmonary artery catheterization, due to increased risk of ventricular arrhythmias 2

Procedure-Specific Considerations

• The American College of Cardiology recommends being prepared to manage complete heart block with rapid transcutaneous pacing or emergent transvenous pacing if sustained rate support becomes necessary for patients undergoing carotid endarterectomy/stenting 5

Intraoperative Management Protocol

• The American College of Cardiology recommends initiating transcutaneous pacing for hemodynamically unstable bradycardia unresponsive to pharmacologic therapy for patients with bradycardia undergoing general surgery 2

Postoperative Considerations

• The American College of Cardiology recommends waiting at least 72 hours before considering permanent pacing to avoid unnecessary implantation for patients with conduction disturbances after isolated CABG 2
• The American College of Cardiology recommends permanent pacing only for new sinus node dysfunction or AV block with persistent symptoms or hemodynamic instability that does not resolve after isolated CABG 2