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tachycardia |
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tachycardia
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Before each trial started, the subjects rested until 1 minute had passed without an increase in heart rate. Previous studies on the daily variation of particulate air pollution and heart rate variability in elderly subjects showed an increase in heart rate (Liao et al. This is termed cardiovascular drift, where the increase in heart rate and the decrease in stroke volume are equal in magnitude, but opposite in direction (2). |
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