Cardiagra is not a commonly used word, and its spelling may seem confusing at first glance. However, its spelling reflects its origin and meaning. "Cardi-" comes from the Greek word for heart, "kardia," while "-agra" is a suffix indicating pain or swelling. Thus, Cardiagra refers to pain or discomfort in the heart or chest area. In IPA phonetic transcription, it would be written as /ˌkɑːrdiˈæɡrə/ to reflect the stress on the second syllable and the "a" sound in the final syllable.
1. A gouty affection of the heart. 2. Angina pectoris.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.