Rapid rate: Nervousness alone usually doesn't cause the heart rate to exceed 120/minute. Your rate of 145, if accurate, lasting an hour is more consistent with an episode of a paroxysmal tachycardia. Without a recording or EKG during that time we can't be sure if the nature of the arrhythmia. If repeated similar episodes occur, consult a cardiologist for evaluation and advice.
Answered 9/9/2019
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