For a patient with a history of MVR who reports wheezing with exercise, what should be ordered?

In the context of a patient with a history of mitral valve regurgitation (MVR) who reports wheezing with exercise, ordering pulmonary function tests is a crucial step. These tests will help assess the patient's lung function and identify any underlying conditions, such as asthma or chronic obstructive pulmonary disease (COPD), that may be contributing to the wheezing.

Pulmonary function tests can measure the patient's airflow, lung volume, and gas exchange efficiency, providing valuable information about the respiratory system's status. This data is essential before proceeding to other interventions or treatments because it can clarify the nature of the respiratory symptoms. If the tests indicate a reactive airway disease or another pulmonary issue, this evidence will guide further management appropriately.

While other options may have their merits in the context of managing respiratory issues, relying on pulmonary function tests first helps establish a clearer diagnostic path, ensuring that any subsequent treatments or referrals are based on solid evidence of the patient's lung function.