Which diagnostic test is NOT typically performed to diagnose cystic fibrosis?

The choice of an electrocardiogram as a diagnostic test for cystic fibrosis is not typical. Cystic fibrosis is a genetic disorder primarily affecting the lungs, pancreas, and other organs, leading to the production of thick, sticky mucus that can cause severe respiratory and digestive issues.

Diagnostic tests commonly used for cystic fibrosis include chest X-rays, which can reveal lung changes associated with the disease, pulmonary function tests to assess lung function and capacity, and sputum cultures to identify the presence of specific bacteria that commonly infect the lungs in individuals with cystic fibrosis.

An electrocardiogram, on the other hand, is used to assess the electrical activity of the heart and diagnose various heart conditions but does not provide relevant information regarding lung function or the presence of cystic fibrosis. Therefore, it is not routinely performed in the diagnostic work-up for cystic fibrosis.