Fast heart rate: It is important to know her actual heart rate to assess whether she has simple sinus tachycardia or a more serious arrhythmia. Stress or anxiety could be factors. Avoiding stimulants like caffeine and certain medications is important. Reassure her as much as you can and have her take slow deep breaths, but if her heart rate exceeds 100, medical evaluation would be needed.
Answered 2/24/2019
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