3.pulse pressure pp脉压（pulse pressure pp）是收缩压与舒张压的差值。平均动脉压（mean blood pressure MBP）是心动周期中给予动脉内血液的平均推动力，.
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Objective To investigate the effect of nitric acid ester on pulse pressure(PP) in elderly patients with isolated systolic hypertension(ISH).
目的观察硝酸酯类药物对老年单纯收缩期高血压（ISH）患者脉压（PP）的影响。
Objective: To find out the relationship between pulse pressure (PP) and left atrial geometric pattern in aged patients with hypertension.
目的：探讨老年高血压患者脉压(PP)与左房构型改变的相关关系。
Objective To research the significance and change of pulse pressure (PP) in elderly patients with acute cerebral infraction.
目的研究老年急性脑梗死患者脉压的变化及意义。
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