Goldenhar syndrome (GS), also known as oculo-auriculo-vertebral dysplasia (OAV), is a rare developmental syndrome characterized by a classic triad of mandibular hypoplasia resulting in facial asymmetry, ear and/or eye malformations, and vertebral anomalies.

Supraventricular tachycardia (SVT) is an abnormally increased heart rate (over 100 beats per minute at rest) with origin above the level of the ventricles.