Natriuretic peptides are hormones produced by the heart, primarily in response to increased blood volume and pressure. They help regulate blood pressure and fluid balance by promoting the excretion of sodium and water through the kidneys. This process is known as natriuresis, which helps reduce the workload on the heart. There are three main types of natriuretic peptides: Atrial Natriuretic Peptide (ANP), Brain Natriuretic Peptide (BNP), and C-type Natriuretic Peptide (CNP). ANP is released from the atria, while BNP is produced in the ventricles. These peptides play a crucial role in cardiovascular health and are often measured to assess heart function.