The Collaborative International Dictionary of English v.0.48:
Cardialgla \Car`di*al"gl*a\, Cardialgy \Car"di*al`gy\, n. [NL. cardialgia, fr. Gr. ?; ? heart + ? pain: cf. F. cardialgie.] (Med.) A burning or gnawing pain, or feeling of distress, referred to the region of the heart, accompanied with cardiac palpitation; heartburn. It is usually a symptom of indigestion. [1913 Webster] Cardigan