Objective:To study the correlations of serum estrogen level with coronary heart disease(CHD) and heart function to evaluate submaximal bicycle exercise test(SBET,Bruce programme) in the middle and aged women.

• 目的:探讨中老年妇女血清雌激素水平与冠心病(CHD)和心功能的相关性,及其运动试验对冠心病的诊断价值。