Evaluation of left ventricular function with cardiac magnetic resonance imaging and echocardiography after administration of dobutamine and esmolol in healthy beagle dogs

evaluation of LV function with cardiac MRI & #echocardiography after administration of dobutamine& esmolol in dogs. Evaluation should be conducted carefully because EF & SV measured by echocardiography can be overestimated, compared with EF &am