但是受试者的心脏动脉还表现出了一个可测量的变化：血管有轻度的但是明显的缩小。
But the participants also showed a measurable change in their heart arteries: a slight but distinct narrowing of the vessels.
结论：血管横切面积缩小及血流量降低在老年ed流行病学中起重要作用。
Conclusions: The narrowed vessel section area and lowered blood flow volume play important roles on Ed epidemiology of elderly patients.
结论根据血流动力学原理提示血管横切面积轻微缩小足以使血流量明显降低，这在老年ed的流行病学中起着重要作用。
Conclusions The slightly narrowed vessel section area can cause notable lowered blood flow volume and act an important role on Ed epidemiology of elderly patients.
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