Asthenia syndrome of heart and kidney yang refers to the symptoms of blood stagnation and retention of fluid due to decline of heart and kidney yang qi. This syndrome is mainly caused by decline of heart yang and prolonged disease involving the kidney; or by retention of fluid attacking on the heart due to deficiency of kidney yang and failure of qi transformation.

Clinical manifestations:
Palpitation, cold body and limbs, dispiritedness and lassitude, edema of limbs, dysuria, cyanosis of the lips and nails, light-colored, dull and purplish tongue, whitish and slippery fur as well as sinking, thin and indistinct pulse. Such symptoms are usually seen in heart and kidney failure due to hypertension, infectious endocarditis, myocarditis, chronic pulmonary heart disease, chronic nephritis, systemic lupus erythematosus, diabetes, hypothyroidism and epidemic hemorrhagic fever.
 
Analysis of the symptoms:
Palpitation is caused by asthenia of heart and kidney yang as well as failure of the heart to warm, nourish and propel~ edema of limbs and dysuria are caused by asthenia of kidney yang, dysfunction of qi transformation and internal retention of dampness cyanosis of the lips and nails, light-colored, dull and purplish tongue are caused by asthenia of heart and kidney yang which fails to transport blood; cold body and limbs, dispiritedness and lassitude, whitish and slippery fur as well as sinking, thin and indistinct pulse are the signs of asthenia of heart and kidney yang as well as internal exuberance of yin cold.
 
Key points for syndrome differentiation:
This syndrome is marked by severe palpitation, edema of limbs, dysuria as well as cold body and limbs, dispiritedness and lassitude.