The mechanical properties of the heart are well understood. Tricuspid valve calcification may lead to stenosis, resulting in myocardial hypertrophy and decreased cardiac output. On the other end of the spectrum, mitral valve prolapse may lead to eventual mitral regurgitation. Eventually, chronic tendinous injury to the chordae tendineae attaching the valve to the papillary muscles may occur, producing a flail leaflet. It is simple: the heart strings produce the music of harmony. 

But what of discord? What of when the harmony fails us?