Tachycardia in an adult is defined as a heart rate greater then ___ beats per minute,with otherwise normal findings on the ECG.

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Tachycardia in an adult is a heart rate greater than 100 beats per minute.The rate usually is between 100 and 180 beats per minute.This condition most often is a physiologic response to exercise,anxiety,stress,or emotion.Pathophysiologic causes include fever,hypertension,hypoxia,infection,anemia,hyperthyroidism,and heart failure.Drugs that may cause sinus tachycardia include atropine,epinephrine,alcohol,nicotine,and caffeine.

Tachycardia in an Adult Is Defined as a Heart Rate