[Minimally invasive coronary bypass: optimal performance after a learning period]

Area of Science:

• Cardiovascular Surgery
• Minimally Invasive Techniques
• Surgical Outcomes

Background:

• Minimally invasive cardiac surgery (MICS) requires a substantial learning curve for surgeons to achieve optimal outcomes.
• Demonstrating the benefits of MICS, such as reduced morbidity and faster recovery, is crucial for its widespread adoption.
• This study tracks the evolution of results over time to quantify the learning period in MICS coronary bypass grafting.

Purpose of the Study:

• To evaluate the learning curve associated with minimally invasive coronary bypass surgery.
• To quantify improvements in key surgical outcomes over a 21-month period.
• To compare the efficacy of minimally invasive coronary bypass with traditional sternotomy approaches.

Main Methods:

• Retrospective analysis of 27 patients undergoing minimally invasive coronary bypass via thoracotomy over 21 months.
• Patients divided into four consecutive groups based on surgical period (initial, intermediate, advanced, current).
• Comparison of operative time, intensive care unit (ICU) stay, and postoperative hospital stay between groups and with sternotomy cohorts.

Main Results:

• Operating time decreased from 124 +/- 14 min (initial) to 98 +/- 18 min (current period).
• ICU stay reduced from 2.6 +/- 1.1 days to 1.6 +/- 0.5 days.
• Postoperative hospital stay decreased from 9.0 +/- 1.4 days to 5.9 +/- 1.5 days, showing significant improvement over sternotomy.

Conclusions:

• A distinct learning period is essential to realize the full benefits of minimally invasive coronary bypass.
• The data indicate that MICS offers reduced operative time, shorter ICU and hospital stays compared to sternotomy.
• Minimally invasive coronary bypass is poised to become a preferred alternative to sternotomy for select cardiac surgery indications.