Postoperative hemodynamics following aortic cross-clamping during aortocoronary bypass surgery

Area of Science:

• Cardiovascular Surgery
• Cardiac Anesthesia
• Surgical Techniques

Background:

• Aortocoronary bypass surgery is a critical procedure for treating coronary artery disease.
• The duration of cardiopulmonary bypass can influence patient outcomes.
• Minimizing surgical time is often a goal in cardiac procedures.

Purpose of the Study:

• To evaluate the impact of aortic cross-clamping on surgical time and postoperative hemodynamics in aortocoronary bypass surgery.
• To compare outcomes between patients undergoing surgery with and without aortic cross-clamping during distal anastomoses.

Main Methods:

• Forty-one patients were divided into two groups: aortic unclamped (n=17) and aortic clamped (n=24).
• Myocardial protection was achieved through cold saline immersion during aortic clamping.
• Postoperative hemodynamic function, cardiopulmonary bypass time, and bypass time per graft were assessed.

Main Results:

• Cardiopulmonary bypass time was significantly shorter in the clamped group (87 min) compared to the unclamped group (107 min).
• Cardiopulmonary bypass time per graft was also reduced in the clamped group (40 min) versus the unclamped group (48 min).
• No significant adverse effects on immediate postoperative hemodynamic parameters (cardiac index, stroke index, ventricular work indices) were observed between the groups.

Conclusions:

• Aortic cross-clamping during distal anastomoses expedites aortocoronary bypass surgery.
• This surgical approach does not compromise immediate postoperative hemodynamic stability.
• The findings suggest that aortic cross-clamping is a safe and efficient modification for aortocoronary bypass procedures.