FLOW RATE NOT STROKE VOLUME IS A SUPERIOR PROGNOSTIC MARKER OF TRANSORTIC FLOW AND FLOW RESERVE IN PATIENTS WITH LOW-FLOW LOW-GRADIENT AORTIC STENOSIS UNDERGOING LOW-DOSE DOBUTAMINE ECHOCARDIOGRAPHY

The objectives of low-dose dobutaminestress echocardiography (LDDSE) in low-flow low-gradient aortic stenosis (LFLG AS) are both to normalise transvalvular flow, at which juncturethe aortic valve area informs the true AS severity, and to assess flow reserve. Conventionally, these assessments are