Assertion: asymptomatic aortic stenosis | /r/DefinedAs | echocardiography
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text: The second cohort was recruited from the prospective SEAS study ( NCT00092677 ), which enrolled 1873 patients with asymptomatic aortic stenosis, defined by echocardiography at local study centres as aortic valve thickening and transaortic Doppler jet velocity ≥2.5