Partial Anomalous Pulmonary Venous Return

**Semantic type:** Disease or Syndrome

**Definition:** A congenital heart disorder in which one or two pulmonary veins are not connected to the left atrium and drain into the right atrium instead. It may lead to arrhythmias and pulmonary hypertension.

**Synonyms:** - Partial Anomalous Pulmonary Venous Connection