Coronary insufficiency after stentless aortic root replacement: risk factors and solutions

Area of Science:

• Cardiovascular Surgery
• Thoracic Surgery
• Medical Devices

Background:

• Coronary insufficiency is a serious complication following total aortic root replacement (ARR).
• Risk factors for this complication after ARR using stentless porcine valves are not well-defined.
• Understanding incidence and risk factors is crucial for improving patient outcomes.

Purpose of the Study:

• To determine the incidence, risk factors, management, and outcomes of coronary insufficiency after total aortic root replacement (ARR) with stentless porcine valves.
• To identify patient and procedural characteristics associated with coronary insufficiency.
• To inform preventive strategies and treatment protocols.

Main Methods:

• Retrospective analysis of 503 patients undergoing stentless porcine total ARR between 1993 and 2005.
• Definition of coronary insufficiency: need for unplanned bypass grafting to address myocardial compromise.
• Comparison of demographic and procedural data between patients with and without coronary insufficiency.

Main Results:

• Overall incidence of coronary insufficiency was 2.6% (13 of 503), affecting only the right coronary artery.
• Patients with coronary insufficiency were more likely to be female (85%), have a higher BMI (34.6 kg/m2), and receive smaller prostheses (23.9 mm).
• Operative mortality was similar between groups despite longer cardiopulmonary bypass times in the insufficiency group.

Conclusions:

• Coronary artery insufficiency is uncommon after stentless aortic root replacement, predominantly affecting the right coronary artery.
• Key risk factors include female sex, elevated body mass index, and small aortic root size.
• Preventive measures like careful coronary orientation and mobilization, coupled with prompt bypass grafting, can lead to good outcomes.