What clinical test helps in the identification of Pulmonary Hypertension in patients?

Right heart catheterization is the definitive clinical test used to identify pulmonary hypertension. This invasive procedure measures the pressures in the right side of the heart and the pulmonary artery directly, providing accurate information about the pulmonary vascular resistance and cardiac output. It is considered the gold standard for diagnosing pulmonary hypertension because it allows for the direct assessment of the hemodynamic status of the pulmonary circulation.

In contrast, while a chest X-ray may reveal signs suggestive of pulmonary hypertension, such as right heart enlargement or elevated pulmonary arteries, it does not provide definitive diagnosis or hemodynamic measurements. Pulmonary function tests (PFTs) with decreased volumes can indicate other types of respiratory issues but are not specific for pulmonary hypertension. Blood cultures are used to detect infections and have no relevance in diagnosing this particular condition. Therefore, right heart catheterization is critical for an accurate diagnosis and assessment of pulmonary hypertension.