Management of Severe Juxtarenal Aortic Stenosis

Diagnostic Approach

• The American College of Cardiology recommends echocardiography as the primary diagnostic tool for evaluating the severity of aortic stenosis, including valve area calculation, peak velocity, and mean gradient measurements, and left ventricular ejection fraction assessment 1, 3
• Functional capacity evaluation through exercise testing is crucial for risk assessment, as recommended by the European Heart Journal 3

Management Algorithm

• The American College of Cardiology recommends aortic valve replacement (AVR) as the treatment for severe aortic stenosis in symptomatic patients, with the choice between transcatheter aortic valve replacement (TAVR) and surgical aortic valve replacement (SAVR) based primarily on surgical risk 1, 2
• For symptomatic patients with severe aortic stenosis, AVR is considered appropriate regardless of surgical risk, and medical management alone is rarely appropriate, as stated by the American College of Cardiology 1, 4
• The American College of Cardiology suggests that the decision between TAVR and SAVR should be based on surgical risk, with SAVR generally preferred for low surgical risk patients, and TAVR an appropriate alternative for intermediate or high surgical risk patients 2, 4, 5, 6
• For patients with prohibitive surgical risk, TAVR is the recommended approach, according to the American College of Cardiology 6
• The European Heart Journal recommends considering TAVR for patients with frailty, porcelain aorta, hostile chest, or significant comorbidities, and medical management with palliative balloon valvuloplasty for patients with life expectancy <1 year or moderate-to-severe dementia 5, 6

Indications for Intervention

• The American College of Cardiology recommends intervention for asymptomatic patients with severe aortic stenosis and reduced left ventricular ejection fraction (<50%), abnormal stress test, very severe AS (Vmax ≥5 m/sec or mean gradient ≥60 mmHg), or when undergoing cardiac surgery for another indication 1, 4
• For patients with reduced ejection fraction (LVEF 20-49% with low flow, low gradient), the American College of Cardiology suggests that AVR is appropriate with flow reserve on dobutamine echo and truly severe AS, and medical management is appropriate with pseudosevere AS 1, 2

Perioperative Management

• The European Heart Journal recommends careful hemodynamic monitoring during non-cardiac surgery for symptomatic patients, and considering AVR before non-cardiac surgery 3, 7
• For asymptomatic patients requiring non-cardiac surgery, the European Heart Journal suggests that elective non-cardiac surgery can be performed safely, though with risk of heart failure, and considering AVR first if surgery involves large volume shifts 3, 7

Important Considerations

• The American College of Cardiology notes that the relentless progression of severe aortic stenosis means that even asymptomatic patients may eventually require intervention 1