Definition: Lithaemic, also known as a dilated heart syndrome, is a congenital condition characterized by an enlarged left atrium and right ventricle. This condition can lead to several complications, including arrhythmias (irregular heartbeat patterns), pulmonary hypertension, and increased blood pressure in the legs. Lithaemic often affects infants or small children who are born prematurely or have undergone other surgeries. The term "lithaemic" is derived from the Latin word "lithium