The new cardiac surgery patient: defying previous expectations

Area of Science:

• Cardiology
• Cardiac Surgery
• Health Services Research

Background:

• Pre-1999 studies indicated rising preoperative risk factors in coronary artery bypass graft (CABG) surgery patients.
• This research investigates if the trend of increasing cardiac surgery patient risk continued post-1999.
• The study also examines the impact of any risk changes on patient mortality and morbidity.

Purpose of the Study:

• To assess trends in preoperative risk factors for cardiac surgery patients from 2000-2003.
• To determine if patient risk profiles have changed since previous studies.
• To evaluate the effect of these trends on postoperative outcomes, including mortality and morbidity.

Main Methods:

• Prospective data collection from 2754 cardiac surgery patients.
• Patients divided into four cohorts based on operation year (2000-2003).
• Analysis of 56 predefined preoperative, operative, and postoperative variables.

Main Results:

• Most preoperative risk factors remained stable; however, congestive heart failure (CHF) prevalence increased significantly (p < 0.001).
• The proportion of CABG procedures decreased, while valve and non-CABG surgeries increased.
• Postoperative complication rates were unchanged, with a notable decrease in wound infections; overall mortality did not change significantly.

Conclusions:

• Patient risk factors, excluding CHF, showed no significant change between 2000 and 2003.
• Despite an increase in procedure complexity, postoperative complication rates remained stable, with reduced wound infections.
• The findings challenge the assumption of a continuously increasing patient risk profile in cardiac surgery.