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Usefulness of dobutamine echocardiography in distinguishing severe from nonsevere valvular aortic stenosis in patients with depressed left ventricular function and low transvalvular gradients

Heart FailureCardiovascular DiseaseDobutamine EchocardiographyVentricular FunctionValve DiseaseAnesthesiologyValvular Heart DiseasePublic HealthMedicineCardiologyLow Transvalvular GradientsDiastolic FunctionRadiologyCardiovascular Imaging