👉 Hydropsychodes are a group of diseases caused by an abnormal development of the heart valves in children, typically affecting the left and right atria. These abnormalities can lead to various symptoms such as difficulty breathing, swelling in the legs or arms, and changes in heart rhythm. They are characterized by the presence of thickened scar tissue within the valves, which can cause them to open more widely than normal, leading to increased blood flow and potentially causing serious complications if not treated promptly.