Management of Bicuspid Aortic Valve with Calcified Leaflets

Initial Diagnostic Assessment

The American College of Cardiology recommends performing complete transthoracic echocardiography to assess the severity of aortic stenosis and/or regurgitation, followed by imaging of the entire thoracic aorta with either cardiac CT or CMR to evaluate for associated aortopathy 1
The American Heart Association suggests performing complete TTE to quantify valve dysfunction severity using peak velocity, mean gradient, and calculated aortic valve area by continuity equation 2
Measure aortic dimensions at multiple levels: annulus, sinuses of Valsalva, sinotubular junction, and ascending aorta, as recommended by the American College of Cardiology 1
Document the specific fusion pattern, as this predicts clinical outcomes, with right-left coronary cusp fusion being the most common at 70-80% of cases, according to the American College of Cardiology 1, 3
Assess left ventricular response to pressure overload including LVEF, wall thickness, and diastolic function, as recommended by the American Heart Association 2

The American College of Cardiology recommends obtaining cardiac CT or CMR of the entire thoracic aorta, as this is mandatory when BAV is first diagnosed 1
CMR demonstrates superior accuracy (96%) compared to TTE (73%) for valve morphology assessment, according to the American College of Cardiology 1
Identify the aortopathy phenotype: ascending (70-75%), root (15-20%), or extended (5-10%), as recommended by the American College of Cardiology 1

Calcified BAV carries specific risks, including increased risk of calcific nodule displacement into coronary ostia during any intervention, with a hazard ratio of 4.72 for cardiovascular events, according to the Journal of the American College of Cardiology 4
Higher risk of annular rupture, root perforation, and aortic dissection, as reported by the Journal of the American College of Cardiology 4

Symptomatic patients (angina, syncope, heart failure) with severe stenosis require aortic valve replacement, as recommended by the American Heart Association 2
Surgical AVR remains the gold standard for BAV with calcification, according to the Journal of the American College of Cardiology 4
TAVR in BAV shows higher procedural mortality (3.6% vs 0.9% in tricuspid valves) and increased paravalvular regurgitation (28.4% overall, 17.4% with CT-based sizing), as reported by the Journal of the American College of Cardiology 4
Type 1 BAV (single raphe) has higher post-TAVR regurgitation rates (34.2% vs 13.3% for type 0) due to bulky calcium preventing adequate stent apposition, according to the Journal of the American College of Cardiology 4

Establish serial echocardiographic surveillance every 6-12 months depending on severity, as recommended by the American Heart Association 2
Screen first-degree relatives for BAV and thoracic aortic disease, according to the American College of Cardiology 5

Do not delay aortic imaging, as calcified leaflets indicate advanced disease, and 12.3% of BAV patients develop ascending aorta dimensions >45mm requiring intervention, as reported by the Journal of the American College of Cardiology 4
Do not assume TAVR is equivalent to surgical AVR in calcified BAV, as bulky calcium along the raphe prevents adequate stent apposition and increases complications, according to the Journal of the American College of Cardiology 4
Do not overlook coronary ostial assessment, as calcified cusp displacement can cause catastrophic coronary obstruction, as reported by the Journal of the American College of Cardiology and the European Heart Journal 4, 6

Large eccentric calcium extending into the LVOT is explicitly identified as a predictor of annular rupture during valve deployment, according to the American College of Cardiology 7, 8
The American College of Cardiology warns that LVOT calcium "may predispose for paravalvular regurgitation and annular rupture during valve deployment" 7, 8
Bulky calcium prevents adequate stent apposition to the annulus, creating gaps that allow paravalvular leak, as noted in JACC: Cardiovascular Imaging 9

The American College of Cardiology recommends convening a multidisciplinary Heart Team discussion to review the specific calcium distribution and extent 7, 10
Quantify LVOT calcium burden using volumetric CT analysis, including measuring upper LVOT calcium volume and assessing overall LVOT calcium volume, as recommended by the American College of Cardiology and JACC: Cardiovascular Imaging 7, 11

Use ECG-gated cardiac CT with thin-slice reconstruction to precisely map calcium distribution, as recommended by JACC: Cardiovascular Imaging 12, 13
Measure coronary ostial heights and sinus of Valsalva diameter to assess risk, as noted in JACC: Cardiovascular Imaging 11
Use transesophageal echocardiography to monitor for coronary flow during balloon valvuloplasty and valve deployment, as recommended by JACC: Cardiovascular Imaging 9

Do not proceed with TAVR without explicit Heart Team consensus when extensive LVOT calcium is present, as this represents a relative contraindication requiring careful risk-benefit analysis, according to the American College of Cardiology 7, 8
Do not underestimate the mortality risk of annular rupture, which remains one of the most feared TAVR complications with poor outcomes, as noted in JACC: Cardiovascular Imaging 9