Asthenia is cntrails hypofunction, accordingly Qi and Blood, body fluid and its mctabolism, Yin and Yang run upset, induce blockage of the cardice vessels and thoracic obstruction.

• “虚”即是人体脏腑功能减退，从而使气血、津液、阴阳运行失常，导致心脉痹阻不畅而发胸痹。