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[Functional assessment of mitral stenosis].

The following parameters must be taken into account when assessing the severity of mitral stenosis: symptoms, objective examination, electrocardiogram, chest X-ray, a simple exercise test with or without cardiopulmonary test, echocardiography and lastly a hemodynamic test. Differences are often observed between the clinical and instrumental findings. In these cases a major contribution is made by the use of physical effort in response to both ECG and heart catheterization in order to quantify the patient's functional deficiency and valve response. The latter aspect must be validated using a simultaneous comparison between echocardiography and the hemodynamic test and longitudinal clinical studies.