Intraoperative Management of ARCAPA
Primary Surgical Approach
Surgery is recommended for ARCAPA to establish a dual coronary artery supply, performed by surgeons with congenital heart disease expertise at specialized centers. 1, 2, 1, 3
Surgical Technique Selection
The surgical goal is reconstruction of a dual coronary artery system through one of the following approaches:
Preferred Technique: Reimplantation
- Direct reimplantation of the anomalous RCA into the ascending aorta is the superior method for restoring physiological myocardial blood supply 4, 3
- This technique preserves native coronary anatomy and provides optimal long-term perfusion 4
Alternative Technique: Bypass Grafting with Ligation
- Ligation of the anomalous RCA combined with coronary artery bypass grafting (typically saphenous vein graft to the posterior descending artery) is a less traumatic alternative when reimplantation is technically challenging 5
- This approach is recognized as appropriate when the RCA wall is thin and fragile due to chronic low-pressure perfusion 4
- Internal mammary artery grafts should be reserved for left-sided targets if concurrent left coronary disease exists 5
Critical Intraoperative Considerations
Anatomic Assessment
- The anomalous RCA functions as a low-pressure, thin-walled vessel serving as a retrograde venous conduit from the left coronary circulation into the pulmonary artery 4
- Extensive collateral networks from the left coronary artery to the RCA are typically present, causing dilation of both vessels 3, 6
- The left-to-right shunt through the anomalous connection results in elevated pulmonary artery oxygen saturation and high cardiac output 4
Hemodynamic Management
- Maintain adequate systemic perfusion pressure to preserve collateral flow to the RCA territory during manipulation 4
- Monitor for myocardial ischemia in the RCA distribution, particularly the inferior and inferolateral walls 5, 7
- Be prepared for potential hemodynamic instability when ligating or manipulating the anomalous vessel 4
Concurrent Pathology
- Assess for and address concomitant valvular disease, particularly mitral regurgitation, which may coexist with ARCAPA 7
- Evaluate for atherosclerotic disease in the left coronary system, as patients may have concurrent obstructive coronary disease requiring additional bypass grafting 5
- Consider preoperative myocardial fibrosis from chronic ischemia when planning revascularization strategy 8, 3, 6
Blood Conservation Strategy
Implement a multimodal approach with transfusion algorithms and point-of-care testing to limit perioperative transfusions 9
- Lysine analogues (tranexamic acid or aminocaproic acid) should be administered intraoperatively to reduce blood loss and transfusion requirements 9
- Consider off-pump techniques if feasible to reduce bleeding, though this is rarely applicable for ARCAPA repair 9
Antiplatelet Management
If the patient is on antiplatelet therapy preoperatively:
- Clopidogrel and ticagrelor should be withheld for at least 5 days before surgery 9
- Prasugrel should be withheld for at least 7 days before surgery 9
- Tirofiban or eptifibatide should be discontinued 2-4 hours before surgery, and abciximab at least 12 hours before surgery 9
Common Pitfalls to Avoid
- Do not assume asymptomatic presentation indicates low surgical urgency—sudden cardiac death risk persists even without symptoms 5, 4, 7
- Avoid simple ligation without revascularization, as this fails to restore adequate myocardial perfusion 5
- Do not underestimate the fragility of the anomalous RCA wall during surgical manipulation 4
- Recognize that normal preoperative stress testing does not eliminate the need for surgical correction 4, 7