Surgical Thresholds for Bentall Procedure in Bicuspid Aortic Valve Disease

Guideline-Based Recommendations

The European Society of Cardiology recommends surgery at ≥50mm (5.0cm) for bicuspid aortic valve-associated aneurysms, which is explicitly lower than the ≥55mm threshold required for tricuspid valves 1
The American College of Cardiology/American Heart Association provides a Class IIa recommendation for surgery at 5.0-5.4cm diameter when performed by experienced surgeons in a Multidisciplinary Aortic Team, particularly when additional risk factors are present 2
The American College of Cardiology/American Heart Association supports operative intervention at 5.0-5.5cm as reasonable when performed at a Comprehensive Valve Center 3, 4

Patients with bicuspid aortic valve have accelerated aortic wall degeneration and significantly higher dissection risk compared to tricuspid valves 5
Over 60% of acute type A aortic dissections occur in non-dilated ascending aortas (<5.5cm), demonstrating that waiting for larger diameters exposes patients to substantial risk 1, 5
The "root phenotype" demonstrates more malignant behavior with higher velocity of progression and adverse aortic event rates 1, 5

Valve-sparing root replacement should be strongly considered in young patients to avoid lifelong anticoagulation, as recommended by the American College of Cardiology/American Heart Association with Class IIb recommendation when performed at experienced centers 2, 3, 5, 6
If a mechanical valve Bentall is performed, lifelong anticoagulation with vitamin K antagonists is mandatory 1, 5

Bicuspid aortic valve aortopathy is a distinct disease entity from isolated valve disease and requires separate evaluation criteria 5, 6
The case should be reframed to emphasize the 5.0-5.1cm ascending aortic aneurysm with bicuspid aortic valve as the primary indication, not valve dysfunction 2
Additional risk factors should be documented if present: family history of aortic dissection, aortic growth rate ≥0.3-0.5cm/year, aortic coarctation, or resistant hypertension 2, 5, 6
Confirmation that surgery will be performed by experienced surgeons in a Multidisciplinary Aortic Team or Comprehensive Valve Center strengthens the Class IIa recommendation 2, 3