Patients with left ventricular (LV) dysfunction, low-flow low-gradient severe aortic stenosis represent a population of high risk, particularly when they do not have LV contractile reserve (CR). CR has been… Click to show full abstract
Patients with left ventricular (LV) dysfunction, low-flow low-gradient severe aortic stenosis represent a population of high risk, particularly when they do not have LV contractile reserve (CR). CR has been described as an increase in stroke volume index (SVi) ≥20% during dobutamine stress
               
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