Bicycle or dobutamine stress echocardiography can be particularly clinically useful in this situation, giving the opportunity to augment flow and measure the resultant change in hemodynamics non-invasively.
The test allows an objective measure of exercise performance, it also permits a measure of the heart rate response to exercise (excessive tachycardia causes a disproportionate increase in gradient) as well as allowing a comprehensive assessment of change in transmitral gradient, mitral valve area and the pulmonary artery systolic pressure .
https://www.tandfonline.com/doi/full/10.1080/14779072.2019.1632190