Objective To observe the influence of different pressures on heart rate, average arterial pressure and oxygen saturation of blood.

目的观察不同压力对心率、平均动脉压、血氧饱和度的影响。

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Objective: to evaluate the clinical significance of monitoring of blood pressure, heart rate and arterial oxygen saturation during tooth extraction for elderly patients with cardiovascular disease.

目的：评价老年心血管病患者在拔牙中监测血压、心率、血氧饱和度临床意义。

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