Brain Natriuretic Peptide (BNP) is a hormone produced by the heart's ventricles in response to increased pressure and volume. It plays a crucial role in regulating blood pressure and fluid balance by promoting the excretion of sodium and water through the kidneys. Elevated levels of BNP in the blood can indicate heart failure or other cardiac conditions. Clinically, measuring BNP levels helps doctors diagnose and manage heart-related issues. A higher concentration of BNP suggests that the heart is under stress, while lower levels typically indicate better heart function. This test is often used alongside other assessments to evaluate a patient's cardiovascular health.