Objective To investigate the optimal AV delay by means of evaluation of the hemodynamics at different AV delay in patients with a DDD pacemaker implanted.

目的对不同房室延迟DDD起搏患者进行血流动力学评价，探讨DDD起搏最佳房室延迟的设置方法。

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Compared with the control, the vacuum package or adding deoxidant package with materials of low venting quality can constrain the accelerating speed of PV and AV, and delay rancidity.

采用低透气性的包装材料进行真空包装或添加脱氧剂包装，可明显抑制过氧化值和酸价的增加速度，延缓酸败。

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While equipment varies, in most cases the only way to take advantage of the auto level and delay adjustments is to decode in the AV receiver.

ENGADGET: How to actually use Dolby TrueHD and DTS-HD HD