There is high incidence of UAP in aged patients, always result in enfeeblement of viscera, imbalance of Yin and Yang and misadjustment of Qi and blood.

本病多发于中老年人，皆因脏腑亏损，阴阳失调，气血失和所致，气虚常为气滞血瘀的病因病理重要环节。扶正和祛邪是治疗本病的两大法规。