Clinician agreement with perioperative cardiovascular evaluation guidelines and clinical outcomes

Area of Science:

• Cardiology
• Clinical Practice Guidelines
• Health Outcomes Research

Background:

• The 1996 American College of Cardiology/American Heart Association (ACC/AHA) guidelines provide a framework for preoperative cardiac risk stratification.
• Variations in clinical practice from established guidelines are common, but their impact on patient outcomes remains under-investigated.

Purpose of the Study:

• To investigate whether deviations from ACC/AHA guidelines in preoperative cardiac testing recommendations affect perioperative cardiac outcomes.
• To compare clinical outcomes between patients whose preoperative cardiac testing recommendations were concordant versus discordant with ACC/AHA guidelines.

Main Methods:

• Prospective follow-up of 823 patients undergoing 864 preoperative cardiac evaluations between 1995 and 1997.
• Comparison of clinician-ordered testing against ACC/AHA guideline recommendations.
• Analysis of perioperative cardiac complication frequencies in concordant versus discordant groups.

Main Results:

• Overall discordance with ACC/AHA guidelines did not lead to a significant difference in cardiac complication rates (4.1% vs 3.7%, p = 0.81).
• When guidelines recommended testing, clinicians ordered it less frequently (50% of cases), associated with fewer complications (3.2% vs 10.7%, p = 0.02).
• When guidelines did not recommend testing, clinicians ordered it in 7% of cases, showing a trend towards more complications (6.7% vs 2.4%, p = 0.09).

Conclusions:

• Failure to adhere to ACC/AHA guidelines when preoperative cardiac testing was recommended did not increase the frequency of perioperative cardiac complications.
• Clinical practice variations from ACC/AHA guidelines in this cohort did not negatively impact cardiac outcomes.
• Further research may be needed to refine guidelines and understand the nuances of clinical decision-making in preoperative risk assessment.