Discussion on syndrome and treatment of cardiac distension in traditional Chinese medicine from the theory of " Yang-transforming Qi and Yin forming Shape". The physical structure of the heart is equivalent to " Yin",and its function depends on "Yang".The heart is dominated by“Yang-qi”,"Yang-transforming Qi and Yin forming Shape" is the normal function of the heart.While the deficiency of Yang-qi and the formation of Yin are the basic pathogenesis of cardiac distension,therefore," warming Yang to change Qi" is the basic rule to cure heart dis...