What is the role of left ventricle (LV) outflow tract obstruction (LVOTO) in the etiology of aortic stenosis (AS)?

Updated: May 07, 2019
  • Author: Xiushui (Mike) Ren, MD; Chief Editor: Terrence X O'Brien, MD, MS, FACC  more...
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Patients with severe aortic stenosis may be asymptomatic for many years despite the presence of severe LV outflow tract obstruction (LVOTO). LVOTOs have been associated with “high heritability.” One study suggests that 20% of patients with isolated LVOTO had an affected first-degree relative with undetected bicuspid aortic valves. [11]

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